Valentine's Day Surprise Cake

0 First, bake the red velvet cake in a loaf pan following the instructions on the back of the box.  I used milk instead of water for richness.  Once the red velvet cake is baked, flip over and slice the size of a heart shaped cookie/cake cutter.  Set the heart shaped cakes inside a bunt cake pan all around. 
1 Mix the white cake mixture according to the instructions on the back of the box.  Pour over the bunt mold filled with heart-shaped cake.  Bake for 40-45 minutes. Flip over and decorate with frosting, heart-shaped sprinkles and fill the inside of the cake with your choice of fruit!