I added 1 tsp of baking soda instead of baking powder into the dry ingredients for Claudia Roden's orange almond cake. Oops. I stirred it in so I can't unstir it. Should I add some baking powder too - perhaps 1/2 tsp? Or some lemon juice? The recipe has 2 boiled pulverized oranges in it so it is acidic. Thanks for any advice.