INGREDIENTS

For Cake
18.25 ounces White Cake Mix

• 3 ounces Red Jell-O Powder (Strawberry, Raspberry, or Cherry flavor)
• 1 cup Milk
• 3 Eggs
• 2 tsp Vanilla Extract
• 1/2 cup Butter (melted)
• 3 cups Buttercream Frosting

For Buttercream Frosting
• 1/2 cup Butter (softened)
• 4 tbsp Milk
• 3 - 3/4 cup Confectioner\'s Sugar (sifted)
• 2 tsp Vanilla Extract
• Liquid Food Coloring (optional)

DIRECTIONS

For Buttercream Frosting
• Take a big bowl and beat butter in it with an electric mixer for 30 seconds. Keep the speed low.
• Combine sugar, milk, and vanilla with it and now beat for one minute on low speed.
• Now raise the speed of the mixer to medium and keep beating for another one minute till frosting is fluffy.
• Now add food color to it. Just put few drops at a time.
• Keep beating till the desired shade is reached.
• If frosting is thin, add more confectioners\' sugar and if it is thick, add milk.

For Cake
• Preheat the oven to 350 degrees Fahrenheit.
• Grease a 9 inches round cake pan and one 9 inches square cake pan properly. Dust uniformly with flour, keep it aside.
• Take a big mixing bowl and add cake mix, Jell-O powder, milk, butter, eggs, and vanilla.
• Now beat for one minute with an electric mixer, keeping the speed low.
• Raise the speed of the mixer to medium and keep on beating for about two minutes, till the batter is soft and properly blended.
• Now place the batter evenly in the two prepared pans.
• Bake in the preheated oven for 25 to 30 minutes, till the light brown color is reached as well as a toothpick placed in the center of the cake comes out clean. Allow the cakes to cool on wire racks for about 10 minutes.
• To make a heart shaped cake, rotate the square cake so that it seems to be a diamond.
• Now make two semi-circles from the circle cake.
• Set the semi-circles on the top two sides of the diamond to create a heart shape.
• Use buttercream frosting and decorate the cake.

Source:
http://cake-recipes.tumblr.com/