Cream butter and sugar. Add eggs and mashed bananas. Stir flour, salt, baking powder and baking soda together and add to the butter mix. Combine milk and lemon juice and add it to the rest of the ingredients. Stir in nuts and chocolate chips. Spray 12" Dutch Oven with cooking spray. Pour batter into Dutch Oven and bake in 350 degree coals for 45 minutes or until done. Use about 8 coals under oven and 16 on top.