Chocolate Unicorn Cake

By Kim

5.0 / 5

45min

25min

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1 ¾ cups all-purpose flour
1 cup dark cocoa powder (such as Hershey's® Special Dark) sifted
2 teaspoons baking soda
1 teaspoon baking powder
¾ teaspoon salt
1 cup brown sugar firmly packed
½ cup white sugar
½ cup unsalted butter softened
2 large eggs at room temperature
2 teaspoons vanilla extract
1 cup strongly brewed coffee cooled to room temperature
1 cup sour cream
1 cup unsalted butter softened
4 cups sifted powdered sugar
1 ½ teaspoons vanilla extract
¼ teaspoon salt
1 tablespoon heavy cream or more as needed
1 drop blue food coloring or as needed
1 drop purple food coloring or as needed
1 tablespoon pink sprinkles or as needed
1 (.75 ounce) tube black decorating gel
4 marshmallows quartered
1 tablespoon pink sanding sugar or as needed
8 birthday candles