Substitution: Baking Powder November 10, 2009 angelaclaire 1/4 tsp baking soda + rounded 1/2 tsp cream of tartar Yield = 1 tsp baking powder Souce: Pamela Peterson Share this:Click to print (Opens in new window)Click to email a link to a friend (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)