Bake your cake in a large sheet pan so the layers stay thin and even.
Grease a rimmed baking sheet and line it with parchment. Preheat your oven to 350°F.
Make the cake batter as directed, adding the vanilla for extra flavor. Pour it into your pan and bake for about 18–22 minutes or until the center springs back.
Let it cool in the pan for 10 minutes, then transfer it to a cooling rack. Don’t try to cut it while it’s warm.
Once your cake is cool, use a heart-shaped cookie cutter to punch out even pairs. You’ll need two hearts for each mini cake.
Whip the butter until fluffy. Add powdered sugar, vanilla, and cream until smooth and spreadable.
Add the Filling
Spread a layer of cream on one heart and sandwich with a second. Gently press together.
Melt your white chocolate chips or candy melts in the microwave in 30-second intervals. Stir until smooth. Add a drop of food coloring and mix.
Use a fork to lower each cake sandwich into the melted coating or spoon it over. Tap off the excess and place it on a rack to set.
Let them dry completely (around 30 minutes) for drizzle or while they are still wet, you can add sprinkles to set.
Add cute Valentine’s drizzle design you desire.