Janice's Chocolate Oatmeal Cake

In a large bowl, combine oats, rice, and butter. Pour the boiling water over the oat mixture; let stand for 10 minutes. Grease and flour a 13x9x2-inch baking pan; set aside.

Add granulated sugar and brown sugar to the oat mixture; stir until butter is melted. Stir in eggs until combined. Add flour, 2 tablespoons cocoa powder, baking soda, and salt; stir until combined. Stir in 1/2 cup of the chocolate pieces. Pour batter into the prepared pan. Sprinkle with the remaining 1/2 cup chocolate pieces.

Bake in a 350° oven 35 to 40 minutes or until a wooden toothpick inserted near the center of cake comes out clean. Cool completely in pan on a wire rack. Dust with powdered sugar and 2 teaspoons cocoa powder, if you like.