diff --git a/app/api/endpoints/recipes.py b/app/api/endpoints/recipes.py
index 0ccfbe8..557500c 100644
--- a/app/api/endpoints/recipes.py
+++ b/app/api/endpoints/recipes.py
@@ -212,11 +212,27 @@ async def build_recipe(
                 for item in items
                 if item.get("product_name")
             }
-            return build_from_selection(
+            suggestion = build_from_selection(
                 template_slug=req.template_id,
                 role_overrides=req.role_overrides,
                 pantry_set=pantry_set,
             )
+            if suggestion is None:
+                return None
+            # Persist to recipes table so the result can be saved/bookmarked.
+            # external_id encodes template + selections for stable dedup.
+            import hashlib as _hl, json as _js
+            sel_hash = _hl.md5(
+                _js.dumps(req.role_overrides, sort_keys=True).encode()
+            ).hexdigest()[:8]
+            external_id = f"assembly:{req.template_id}:{sel_hash}"
+            real_id = store.upsert_built_recipe(
+                external_id=external_id,
+                title=suggestion.title,
+                ingredients=suggestion.matched_ingredients,
+                directions=suggestion.directions,
+            )
+            return suggestion.model_copy(update={"id": real_id})
         finally:
             store.close()
 
diff --git a/app/api/routes.py b/app/api/routes.py
index 97e2637..c19770c 100644
--- a/app/api/routes.py
+++ b/app/api/routes.py
@@ -9,11 +9,11 @@ api_router.include_router(receipts.router,       prefix="/receipts",       tags=
 api_router.include_router(ocr.router,            prefix="/receipts",       tags=["ocr"])
 api_router.include_router(export.router,                                   tags=["export"])
 api_router.include_router(inventory.router,      prefix="/inventory",      tags=["inventory"])
+api_router.include_router(saved_recipes.router,  prefix="/recipes/saved",  tags=["saved-recipes"])
 api_router.include_router(recipes.router,        prefix="/recipes",        tags=["recipes"])
 api_router.include_router(settings.router,       prefix="/settings",       tags=["settings"])
 api_router.include_router(staples.router,        prefix="/staples",        tags=["staples"])
 api_router.include_router(feedback.router,       prefix="/feedback",       tags=["feedback"])
 api_router.include_router(household.router,      prefix="/household",      tags=["household"])
-api_router.include_router(saved_recipes.router,  prefix="/recipes/saved",  tags=["saved-recipes"])
 api_router.include_router(imitate.router,        prefix="/imitate",        tags=["imitate"])
 api_router.include_router(community_router)
\ No newline at end of file
diff --git a/app/db/store.py b/app/db/store.py
index 65fafdd..0e6546f 100644
--- a/app/db/store.py
+++ b/app/db/store.py
@@ -686,6 +686,44 @@ class Store:
     def get_recipe(self, recipe_id: int) -> dict | None:
         return self._fetch_one("SELECT * FROM recipes WHERE id = ?", (recipe_id,))
 
+    def upsert_built_recipe(
+        self,
+        external_id: str,
+        title: str,
+        ingredients: list[str],
+        directions: list[str],
+    ) -> int:
+        """Persist an assembly-built recipe and return its DB id.
+
+        Uses external_id as a stable dedup key so the same build slug doesn't
+        accumulate duplicate rows across multiple user sessions.
+        """
+        import json as _json
+        self.conn.execute(
+            """
+            INSERT OR IGNORE INTO recipes
+              (external_id, title, ingredients, ingredient_names, directions, source)
+            VALUES (?, ?, ?, ?, ?, 'assembly')
+            """,
+            (
+                external_id,
+                title,
+                _json.dumps(ingredients),
+                _json.dumps(ingredients),
+                _json.dumps(directions),
+            ),
+        )
+        # Update title in case the build was re-run with tweaked selections
+        self.conn.execute(
+            "UPDATE recipes SET title = ? WHERE external_id = ?",
+            (title, external_id),
+        )
+        self.conn.commit()
+        row = self._fetch_one(
+            "SELECT id FROM recipes WHERE external_id = ?", (external_id,)
+        )
+        return row["id"]  # type: ignore[index]
+
     def get_element_profiles(self, names: list[str]) -> dict[str, list[str]]:
         """Return {ingredient_name: [element_tag, ...]} for the given names.
 
diff --git a/app/services/recipe/assembly_recipes.py b/app/services/recipe/assembly_recipes.py
index a9c1ca5..c68e6ca 100644
--- a/app/services/recipe/assembly_recipes.py
+++ b/app/services/recipe/assembly_recipes.py
@@ -995,6 +995,12 @@ def build_from_selection(
     effective_pantry = pantry_set | set(role_overrides.values())
     title = _personalized_title(tmpl, effective_pantry, seed + tmpl.id)
 
+    # Items in role_overrides that aren't in the user's pantry = shopping list
+    missing = [
+        item for item in role_overrides.values()
+        if item and item not in pantry_set
+    ]
+
     return RecipeSuggestion(
         id=tmpl.id,
         title=title,
@@ -1002,7 +1008,7 @@ def build_from_selection(
         element_coverage={},
         swap_candidates=[],
         matched_ingredients=all_matched,
-        missing_ingredients=[],
+        missing_ingredients=missing,
         directions=tmpl.directions,
         notes=tmpl.notes,
         level=1,
diff --git a/frontend/src/components/BuildYourOwnTab.vue b/frontend/src/components/BuildYourOwnTab.vue
index 108f8b7..0c63e02 100644
--- a/frontend/src/components/BuildYourOwnTab.vue
+++ b/frontend/src/components/BuildYourOwnTab.vue
@@ -186,6 +186,13 @@
           @close="phase = 'select'"
           @cooked="phase = 'select'"
         />
+        <!-- Shopping list: items the user chose that aren't in their pantry -->
+        <div v-if="(builtRecipe.missing_ingredients ?? []).length > 0" class="cart-list card mb-sm">
+          <h3 class="text-sm font-semibold mb-xs">🛒 You'll need to pick up</h3>
+          <ul class="cart-items">
+            <li v-for="item in builtRecipe.missing_ingredients" :key="item" class="cart-item text-sm">{{ item }}</li>
+          </ul>
+        </div>
         <div class="byo-actions mt-sm">
           <button class="btn btn-secondary" @click="resetToTemplate">Try a different build</button>
           <button class="btn btn-secondary" @click="phase = 'wizard'">Adjust ingredients</button>
@@ -231,6 +238,8 @@ const builtRecipe = ref<RecipeSuggestion | null>(null)
 const buildLoading = ref(false)
 const buildError = ref<string | null>(null)
 
+// Shopping list is derived from builtRecipe.missing_ingredients (computed by backend)
+
 const missingModes = [
   { label: 'Available only', value: 'hidden' },
   { label: 'Show missing',   value: 'greyed' },
@@ -281,6 +290,7 @@ function toggleIngredient(name: string) {
   const current = new Set(roleOverrides.value[role] ?? [])
   current.has(name) ? current.delete(name) : current.add(name)
   roleOverrides.value = { ...roleOverrides.value, [role]: [...current] }
+
 }
 
 function useCustomIngredient() {
@@ -288,9 +298,27 @@ function useCustomIngredient() {
   if (!name) return
   const role = currentRole.value?.display
   if (!role) return
+
+  // Add to role overrides so it's included in the build request
   const current = new Set(roleOverrides.value[role] ?? [])
   current.add(name)
   roleOverrides.value = { ...roleOverrides.value, [role]: [...current] }
+
+  // Inject into the local candidates list so it renders as a selected card.
+  // Mark in_pantry: true so it stays visible regardless of missing-ingredient mode.
+  if (candidates.value) {
+    const knownNames = new Set([
+      ...(candidates.value.compatible ?? []).map((i) => i.name.toLowerCase()),
+      ...(candidates.value.other ?? []).map((i) => i.name.toLowerCase()),
+    ])
+    if (!knownNames.has(name.toLowerCase())) {
+      candidates.value = {
+        ...candidates.value,
+        compatible: [{ name, in_pantry: true, tags: [] }, ...(candidates.value.compatible ?? [])],
+      }
+    }
+  }
+
   filterText.value = ''
 }
 
@@ -536,4 +564,23 @@ onMounted(async () => {
   padding: 0;
   text-decoration: underline;
 }
+
+.cart-list {
+  padding: var(--spacing-sm) var(--spacing-md);
+}
+
+.cart-items {
+  list-style: none;
+  display: flex;
+  flex-wrap: wrap;
+  gap: var(--spacing-xs);
+  margin-top: var(--spacing-xs);
+}
+
+.cart-item {
+  background: var(--color-bg-secondary);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-sm);
+  padding: 2px var(--spacing-sm);
+}
 </style>
diff --git a/frontend/src/components/RecipeDetailPanel.vue b/frontend/src/components/RecipeDetailPanel.vue
index bd08fe2..4bd3334 100644
--- a/frontend/src/components/RecipeDetailPanel.vue
+++ b/frontend/src/components/RecipeDetailPanel.vue
@@ -161,14 +161,21 @@
             <div class="add-pantry-col">
               <p v-if="addError" role="alert" aria-live="assertive" class="add-error text-xs">{{ addError }}</p>
               <p v-if="addedToPantry" role="status" aria-live="polite" class="add-success text-xs">✓ Added to pantry!</p>
-              <button
-                class="btn btn-accent flex-1"
-                :disabled="addingToPantry"
-                @click="addToPantry"
-              >
-                <span v-if="addingToPantry">Adding…</span>
-                <span v-else>Add {{ checkedCount }} to pantry</span>
-              </button>
+              <div class="grocery-actions">
+                <button
+                  class="btn btn-primary flex-1"
+                  @click="copyGroceryList"
+                >{{ groceryCopied ? '✓ Copied!' : `📋 Grocery list (${checkedCount})` }}</button>
+                <button
+                  class="btn btn-secondary"
+                  :disabled="addingToPantry"
+                  @click="addToPantry"
+                  :title="`Add ${checkedCount} item${checkedCount !== 1 ? 's' : ''} to your pantry`"
+                >
+                  <span v-if="addingToPantry">Adding…</span>
+                  <span v-else>+ Pantry</span>
+                </button>
+              </div>
             </div>
           </template>
           <button v-else class="btn btn-primary flex-1" @click="handleCook">
@@ -246,6 +253,7 @@ const checkedIngredients = ref<Set<string>>(new Set())
 const addingToPantry = ref(false)
 const addedToPantry = ref(false)
 const addError = ref<string | null>(null)
+const groceryCopied = ref(false)
 
 const checkedCount = computed(() => checkedIngredients.value.size)
 
@@ -300,6 +308,19 @@ async function shareList() {
   }
 }
 
+async function copyGroceryList() {
+  const items = [...checkedIngredients.value]
+  if (!items.length) return
+  const text = `Shopping list for ${props.recipe.title}:\n${items.map((i) => `• ${i}`).join('\n')}`
+  if (navigator.share) {
+    await navigator.share({ title: `Shopping list: ${props.recipe.title}`, text })
+  } else {
+    await navigator.clipboard.writeText(text)
+    groceryCopied.value = true
+    setTimeout(() => { groceryCopied.value = false }, 2000)
+  }
+}
+
 function groceryLinkFor(ingredient: string): GroceryLink | undefined {
   const needle = ingredient.toLowerCase()
   return props.groceryLinks.find((l) => l.ingredient.toLowerCase() === needle)
@@ -577,6 +598,12 @@ function handleCook() {
   gap: 2px;
 }
 
+.grocery-actions {
+  display: flex;
+  gap: var(--spacing-xs);
+  align-items: stretch;
+}
+
 .add-error {
   color: var(--color-error, #dc2626);
 }
diff --git a/frontend/src/components/SaveRecipeModal.vue b/frontend/src/components/SaveRecipeModal.vue
index bd18466..942cfa3 100644
--- a/frontend/src/components/SaveRecipeModal.vue
+++ b/frontend/src/components/SaveRecipeModal.vue
@@ -209,7 +209,7 @@ async function submit() {
   display: flex;
   align-items: center;
   justify-content: center;
-  z-index: 200;
+  z-index: 500;
   padding: var(--spacing-md);
 }