Bake the Cake Layers

1. Preheat Oven: Set your oven to 350°F (175°C). Grease and flour one 8-inch round pan and one 8-inch square pan.
2. Prepare the Batter: In a bowl, whisk together flour, baking powder, and salt. Set aside.
3. Cream the Butter and Sugar: Using an electric mixer, beat butter and sugar until light and fluffy.
4. Add Eggs and Vanilla: Mix in eggs one at a time, then add vanilla extract.
5. Incorporate Dry Ingredients: Gradually mix in the dry ingredients, alternating with milk, until fully combined.
6. Divide and Bake: Pour batter evenly into the prepared round and square pans. Bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.
7. Cool Completely: Let cakes cool for 10 minutes in the pans, then transfer to a wire rack.

Assemble the Heart Shape

1. Cut the Round Cake: Once cooled, cut the round cake in half to create two equal semicircles.
2. Arrange the Pieces: Place the square cake with a point facing downward. Position the two semicircles at the top sides to form a heart shape.
3. Apply a Crumb Coat: Spread a thin layer of frosting over the entire cake to seal in crumbs. Refrigerate for 15 minutes.

Frost and Decorate

1. Prepare the Frosting: Beat butter until creamy. Add powdered sugar, heavy cream, and vanilla, beating until smooth.
2. Frost the Cake: Spread an even layer of frosting over the entire cake. Use an offset spatula for smooth edges.
3. Decorate: Sprinkle with decorations, add fresh fruit, or drizzle melted chocolate for a finishing touch.