Slow Cooker Peanut Butter Fudge Cake

   Cake 1 cup King Arthur Unbleached All-Purpose Flour 1/2 cup sugar 1 teaspoon baking powder 1/2 teaspoon salt 1/2 cup peanut butter 1/2 cup milk 2 tablespoons soft butter or vegetable oil 1 teaspoon vanilla extract Topping 1/2 cup sugar 1/4 cup cocoa powder 1 cup boiling water Directions 1) To make the cake:…