diff --git a/src/backend/api/routers/recipes.py b/src/backend/api/routers/recipes.py
index 9ce7d87..4e8a99f 100644
--- a/src/backend/api/routers/recipes.py
+++ b/src/backend/api/routers/recipes.py
@@ -9,6 +9,7 @@ from src.backend.api.middleware.api_key import get_current_user, require_maker,
 from src.backend.models.orm.user import User
 from src.backend.models.api.recipe import (
     RecipeCreate,
+    RecipeDuplicate,
     RecipeListResponse,
     RecipeResponse,
     RecipeUpdate,
@@ -52,6 +53,18 @@ async def create_recipe(
     return _recipe_to_response(recipe)
 
 
+@router.post("/{recipe_id}/duplicate", response_model=RecipeResponse, status_code=201)
+async def duplicate_recipe(
+    recipe_id: int,
+    data: RecipeDuplicate,
+    user: User = Depends(require_maker),
+    db: AsyncSession = Depends(get_db),
+):
+    """Duplicate a recipe with its current tasks under a new code (#52). Requires Maker role."""
+    recipe = await recipe_service.duplicate_recipe(db, recipe_id, data.code, data.name, user)
+    return _recipe_to_response(recipe)
+
+
 @router.get("", response_model=RecipeListResponse)
 async def list_recipes(
     page: int = Query(1, ge=1),
diff --git a/src/backend/models/api/recipe.py b/src/backend/models/api/recipe.py
index 07a7888..fdb0b45 100644
--- a/src/backend/models/api/recipe.py
+++ b/src/backend/models/api/recipe.py
@@ -26,6 +26,12 @@ class RecipeCreate(BaseModel):
     annotations_json: Optional[dict] = None
 
 
+class RecipeDuplicate(BaseModel):
+    """Schema for duplicating a recipe (#52): only the new code and name."""
+    code: str = Field(..., min_length=1, max_length=100)
+    name: str = Field(..., min_length=1, max_length=255)
+
+
 class RecipeUpdate(BaseModel):
     """Schema for updating a recipe (creates new version)."""
     name: Optional[str] = Field(None, min_length=1, max_length=255)
diff --git a/src/backend/services/recipe_service.py b/src/backend/services/recipe_service.py
index 7faaeb1..3c252f6 100644
--- a/src/backend/services/recipe_service.py
+++ b/src/backend/services/recipe_service.py
@@ -253,6 +253,78 @@ async def create_recipe(
     return result.scalar_one()
 
 
+async def duplicate_recipe(
+    db: AsyncSession,
+    recipe_id: int,
+    new_code: str,
+    new_name: str,
+    user: User,
+) -> Recipe:
+    """Duplicate a recipe (#52): new code/name, v1 with the current version's tasks.
+
+    The source recipe is left untouched.
+    """
+    source = await _get_recipe_or_404(db, recipe_id)
+
+    existing = await db.execute(select(Recipe).where(Recipe.code == new_code))
+    if existing.scalar_one_or_none() is not None:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail=f"Recipe code '{new_code}' already exists",
+        )
+
+    # Same header fields create_recipe persists, taken from the source recipe
+    recipe = Recipe(
+        code=new_code,
+        name=new_name,
+        description=source.description,
+        image_path=source.image_path,
+        measurement_interval_minutes=source.measurement_interval_minutes,
+        requires_lot=source.requires_lot,
+        requires_serial=source.requires_serial,
+        allow_manual_input=source.allow_manual_input,
+        created_by=user.id,
+    )
+    db.add(recipe)
+    await db.flush()
+
+    version = RecipeVersion(
+        recipe_id=recipe.id,
+        version_number=1,
+        is_current=True,
+        created_by=user.id,
+        change_notes=f"Duplicated from {source.code}",
+    )
+    db.add(version)
+    await db.flush()
+
+    # Reuse the existing deep copy of tasks/subtasks from the current version
+    source_version = await _get_current_version(db, source.id)
+    if source_version is not None:
+        await _copy_tasks_to_version(db, source_version, version)
+
+    await _write_audit(
+        db,
+        recipe_id=recipe.id,
+        old_version_id=None,
+        new_version_id=version.id,
+        changed_by=user.id,
+        change_type="CREATE",
+        change_reason=f"Duplicated from recipe {source.code}",
+    )
+
+    result = await db.execute(
+        select(Recipe)
+        .where(Recipe.id == recipe.id)
+        .options(
+            selectinload(Recipe.versions)
+            .selectinload(RecipeVersion.tasks)
+            .selectinload(RecipeTask.subtasks)
+        )
+    )
+    return result.scalar_one()
+
+
 async def create_new_version(
     db: AsyncSession,
     recipe_id: int,
diff --git a/src/backend/tests/test_recipe_duplicate.py b/src/backend/tests/test_recipe_duplicate.py
new file mode 100644
index 0000000..75bd7ed
--- /dev/null
+++ b/src/backend/tests/test_recipe_duplicate.py
@@ -0,0 +1,74 @@
+"""Tests for POST /api/recipes/{id}/duplicate (#52)."""
+from httpx import AsyncClient
+from sqlalchemy import func, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from src.backend.models.orm.recipe import Recipe, RecipeVersion
+from src.backend.models.orm.task import RecipeSubtask, RecipeTask
+from src.backend.models.orm.user import User
+from src.backend.tests.conftest import auth_headers, create_test_recipe
+
+
+class TestDuplicateRecipe:
+    async def test_duplicate_copies_tasks_and_keeps_original(
+        self, client: AsyncClient, maker_user: User, db_session: AsyncSession
+    ):
+        src = await create_test_recipe(db_session, maker_user.id)
+        src_id = src.id
+        before_tasks = (await db_session.execute(select(func.count(RecipeTask.id)))).scalar_one()
+        before_subs = (await db_session.execute(select(func.count(RecipeSubtask.id)))).scalar_one()
+
+        resp = await client.post(
+            f"/api/recipes/{src_id}/duplicate",
+            json={"code": "REC-COPIA", "name": "Copia"},
+            headers=auth_headers(maker_user),
+        )
+        assert resp.status_code == 201
+        data = resp.json()
+        assert data["code"] == "REC-COPIA" and data["name"] == "Copia"
+        assert data["id"] != src_id
+        assert data["description"] == "A recipe for testing"
+        assert data["current_version"]["version_number"] == 1
+
+        # Tasks and subtasks doubled: copied, not moved
+        after_tasks = (await db_session.execute(select(func.count(RecipeTask.id)))).scalar_one()
+        after_subs = (await db_session.execute(select(func.count(RecipeSubtask.id)))).scalar_one()
+        assert after_tasks == before_tasks * 2
+        assert after_subs == before_subs * 2
+
+        new_version = (await db_session.execute(
+            select(RecipeVersion).where(RecipeVersion.recipe_id == data["id"])
+        )).scalar_one()
+        new_tasks = (await db_session.execute(
+            select(RecipeTask).where(RecipeTask.version_id == new_version.id)
+        )).scalars().all()
+        assert len(new_tasks) == before_tasks
+
+        # Original unchanged
+        orig = (await db_session.execute(select(Recipe).where(Recipe.id == src_id))).scalar_one()
+        assert orig.code == "REC-001" and orig.name == "Test Recipe"
+        orig_versions = (await db_session.execute(
+            select(func.count(RecipeVersion.id)).where(RecipeVersion.recipe_id == src_id)
+        )).scalar_one()
+        assert orig_versions == 1
+
+    async def test_duplicate_code_conflict(
+        self, client: AsyncClient, maker_user: User, db_session: AsyncSession
+    ):
+        src = await create_test_recipe(db_session, maker_user.id)
+        resp = await client.post(
+            f"/api/recipes/{src.id}/duplicate",
+            json={"code": "REC-001", "name": "X"},
+            headers=auth_headers(maker_user),
+        )
+        assert resp.status_code == 409
+
+    async def test_duplicate_missing_recipe(
+        self, client: AsyncClient, maker_user: User
+    ):
+        resp = await client.post(
+            "/api/recipes/99999/duplicate",
+            json={"code": "NEW", "name": "X"},
+            headers=auth_headers(maker_user),
+        )
+        assert resp.status_code == 404