Ingredients:

• 2-1/4 cups Gluten-free flour mix
• 1 teaspoon baking soda
• 3 teaspoon baking powder
• 1 teaspoon. xanthan gum
• 1 teaspoon salt
• 4 eggs
• 1 1/3 cups sugar
• 2/3 cup mayonnaise
• 1 teaspoon vanilla
• 1 cup sour cream
• 1 cup chopped walnuts
• 1/2 cup sugar
• 1/4 cup brown sugar
• 1 teaspoon cinnamon

Directions:

• Mix dry ingredients in a bowl.  Gluten-free flour mix, soda, baking powder, xanthan gum, and salt.
• In a large bowl beat eggs, sugar, mayonnaise, and vanilla until fluffy.
• Add dry ingredients – alternately with 1 cup sour cream – mix well.
• In clean mixing bowl mix topping ingredients, nuts, sugars, cinnamon.
• Grease andGF flour a 9×13 pan.
• Spread half of batter in pan – sprinkle half of topping over batter.  Add rest of batter and top with rest of topping.
• Bake in preheat oven 375° for 35-40 minutes.