01 -
Turn the oven on to 350°F. Line two 18×13-inch sheet pans with parchment and coat with cooking spray. Grab a stand or hand mixer to mix the cake mix, sugar, water, eggs, oil, and vanilla for about a minute. Slowly add flour, salt, and sour cream, beating on medium speed until silky and lump-free for 2 to 3 minutes.
02 -
Pour the batter equally into both pans and even it out. Bake for around 15 to 18 minutes, just until done. Let the layers cool for half an hour on the counter, then move them to the fridge for 1 hour max.
03 -
Using a mixer on medium-high speed, blend the marshmallow fluff and butter until smooth, about a minute. Add in powdered sugar, salt, vanilla, and a few tablespoons of cream. Adjust with more cream if needed, but keep it thick enough to hold its shape when spread.
04 -
Cut 32 heart shapes using a cookie cutter (3 inches wide). Spread filling on half, then sandwich with the other half. Place these on a parchment-lined tray and freeze for about an hour to firm up.
05 -
Melt the almond bark using short bursts in the microwave (30 seconds each), stirring in between until smooth. Mix in the crisco or preferred fat until everything's blended. Save about a cup of uncolored bark for adding details later. The rest can be dyed pink with the gel-based food color. Cool for a few minutes before using.
06 -
Dip the frozen cakes into the pink bark and place them on a rack over parchment. Let them set up for about 10 minutes. Use the plain white chocolate you saved earlier to drizzle over them with swirling motions for decoration.