1/2 cup (100 grams) butter or margarine

2 cups brown sugar

3 eggs

1 teaspoon vanilla

2 teaspoons baking powder

1/2 teaspoon salt

3/4 teaspoon guar gum or xanthan gum (optional)

1/3 cup cocoa

1 1/2 cups gluten-free flour

1 cup chopped nuts (optional)

Blend together with mixer. Spread in a 9×13 inch pan (23 x 33cm) pan.  Bake at 350F (175C) for 30-35 minutes. (I love these and I don’t even need a gluten-free diet!)