We have used this recipe many times for birthdays, holidays, and normal desserts. It is delicious with frosting, or without, and it would also be very good with chocolate chips or nuts.
¼ cup salted butter, melted
¾ cup sugar
½ cup plain yogurt
2 teaspoons vanilla extract
1 cup cornstarch, potato starch, or half-half potato starch/ rice flour, or cornstarch/rice flour mix, whichever is available. Rice flour will make cake grittier and slightly dryer.
1/3 cup unsweetened cocoa powder
1 tablespoon baking powder
½ teaspoon salt
½ teaspoon xanthan gum
Preheat the oven to 350 degrees F. Lightly grease a 9 inch round or square baking pan.
In your bowl, mix the butter with the sugar and beat with electric mixer. Add the eggs, and beat until lighter and thicker. This will take about two minutes. Add the other ingredients. Beat well. The batter will be a thick cake batter. Pour into prepared pan and bake for 30-40 minutes, until a toothpick tests cleanly, and cake doesn’t jiggle.