1 cup all-purpose flour
1 tsp baking powder
¼ tsp baking soda
⅛ tsp fine sea salt
¼ cup good-quality dark cocoa powder, such as Valrhona
1 large egg
â…“ cup canola oil
¾ cup granulated natural cane sugar
1 tsp vanilla extract
½ cup milk
1 recipe The Best Vanilla Buttercream (recipe follows), Confectioners' sugar, or Chocolate Ganache (recipe follows)
3 sticks unsalted butter, at room temperature
2¼ cups confectioners' sugar
1½ tsp vanilla extract
3 Tbsp heavy whipping cream
10 oz bittersweet chocolate chips
1 cup heavy whipping cream
¾ cup granulated natural cane sugar
1 tsp vanilla extract