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!)