By cooking.nytimes.com

One-Bowl Chocolate-Mayonnaise Cake

Ingredients

1 servings

¼ cupunsweetened cocoa powder

Dutch-processed or natural

1 ouncesbittersweet chocolate

chopped, optional

¾ cupwater

boiling, or use hot coffee, Earl Grey tea or mint tea

⅔ cupmayonnaise

¼ teaspoonkosher salt

1 ½ teaspoonsbaking soda

¾ cupgranulated sugar

1 teaspoonvanilla extract

optional

1 ½ cupsall-purpose flour

or cake

Flavorless oil

or another grease, for the pan

Confectioners’ sugar

for finishing

Instructions