1 3/4 cups (230 grams) all purpose flour

3/4 cup (75 grams) Dutch-processed cocoa powder

1 teaspoon baking powder

1/4 teaspoon baking soda

1/4 teaspoon salt

3/4 cup (170 grams) unsalted butter, room temperature

3/4 cup (150 grams) granulated white sugar

1 large egg, room temperature

1 teaspoon pure vanilla extract

1/4 cup (60 ml) buttermilk

1/2 cup (120 ml) lukewarm strong coffee or !/2 cup (120 ml) lukewarm water

Vanilla Filling:

1/4 cup (55 grams) vegetable shortening

1/4 cup (4 tablespoons) (55 grams) unsalted butter, room temperature

1 cup (115 grams) confectioners' (powdered or icing) sugar, sifted

1 1/2 teaspoons pure vanilla extract

1/2 cup (120 ml) light corn syrup

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