INGREDIENTS
3
and 3/4 cups (431g) sifted all-purpose flour1 (measured correctly)
3/4 tsp
baking powder
3/4 tsp
baking soda
1 tsp
salt
1
and 1/2 cups (3 sticks; 345g) unsalted butter, softened to room temperature
2 cups
granulated sugar
3
large eggs, room temperature
4
large egg yolks, room temperature
3
teaspoons vanilla extract
1
and 1/2 cups (360ml) buttermilk, room temperature2
1 cup
unsalted butter, softened to room temperature
4
and 1/2 cups (540g) confectioners' sugar
3/4 cup
natural unsweetened or dutch-process cocoa powder
1/2 cup
milk
1 tbsp
light corn syrup4
2 tsp
vanilla extract
1/8 tsp
salt
around 2 cups assorted candies such as M&Ms, chocolate chips, sprinkles, gummy bears, jelly beans, candy corns, chopped candy bars, mini Reese's cups etc.
optional: additional sprinkles or candies for decorating the cake