diff --git a/pkg/db/recipe_test.go b/pkg/db/recipe_test.go
index 24c845d..d965568 100644
--- a/pkg/db/recipe_test.go
+++ b/pkg/db/recipe_test.go
@@ -94,6 +94,14 @@ func TestRecipeComputeFood(t *testing.T) {
 	assert.Equal(computed_food2.Zinc, float32(22.75))
 	assert.Equal(computed_food2.Mass, float32(23.75))
 	assert.Equal(computed_food2.Price, float32(24.75))
+
+	// Combine recipes in a recipe
+	recipe3 := Recipe{Ingredients: []Ingredient{
+		COUNT.Portion(recipe, 2),
+		COUNT.Portion(recipe2, 1),
+	}}
+	computed_food3 := recipe3.ComputeFood()
+	assert.Equal(computed_food3.Cals, float32(44.75))
 }
 
 func TestRecipeSaveComputedFood(t *testing.T) {
@@ -118,4 +126,17 @@ func TestRecipeSaveComputedFood(t *testing.T) {
 	if diff := deep.Equal(recipe.ComputeFood(), computed_food); diff != nil {
 		t.Error(diff)
 	}
+
+	// Test putting a recipe in a recipe
+	mozza := get_food(db, 83)
+	require.Equal(mozza.Name, "mozzarella")
+	recipe2 := Recipe{Name: "baked pasta w/ mozza", Ingredients: []Ingredient{
+		COUNT.Portion(recipe, 0.5),
+		GRAMS.Of(mozza, 300),
+	}}
+	db.SaveRecipe(&recipe2)
+	computed_food2 := get_food(db, recipe2.ComputedFoodID)
+	if diff := deep.Equal(recipe2.ComputeFood(), computed_food2); diff != nil {
+		t.Error(diff)
+	}
 }
diff --git a/pkg/db/units.go b/pkg/db/units.go
index 1fecdd3..4d9bb09 100644
--- a/pkg/db/units.go
+++ b/pkg/db/units.go
@@ -48,3 +48,29 @@ func (u Units) Of(f Food, n float32) Ingredient {
 		panic(u)
 	}
 }
+
+func (u Units) Portion(r Recipe, n float32) Ingredient {
+	f := r.ComputeFood()
+	switch u {
+	case COUNT:
+		return Ingredient{RecipeID: r.ID, Quantity: n, Units: u, Food: f}
+	case GRAMS:
+		return Ingredient{RecipeID: r.ID, Quantity: n / f.Mass, Units: u, Food: f}
+	case LBS:
+		return Ingredient{RecipeID: r.ID, Quantity: n * 454 / f.Mass, Units: u, Food: f}
+	case OZ:
+		return Ingredient{RecipeID: r.ID, Quantity: n * 28 / f.Mass, Units: u, Food: f}
+	case ML:
+		return Ingredient{RecipeID: r.ID, Quantity: n * f.Density / f.Mass, Units: u, Food: f}
+	case CUPS:
+		return Ingredient{RecipeID: r.ID, Quantity: n * f.Density * 250 / f.Mass, Units: u, Food: f}
+	case TSP:
+		return Ingredient{RecipeID: r.ID, Quantity: n * f.Density * 5 / f.Mass, Units: u, Food: f}
+	case TBSP:
+		return Ingredient{RecipeID: r.ID, Quantity: n * f.Density * 15 / f.Mass, Units: u, Food: f}
+	case FLOZ:
+		return Ingredient{RecipeID: r.ID, Quantity: n * f.Density * 30 / f.Mass, Units: u, Food: f}
+	default:
+		panic(u)
+	}
+}