If you do come upon an old jar of baking powder, there’s an easy way to test it for freshness before adding it to a recipe: Mix 1 cup of hot water with 2 teaspoons of baking powder If it starts ...

A jar of gingerbread cake mix includes several ... In a large bowl, combine the flour, sugar, dry milk powder, baking powder, salt, cinnamon, cream of tartar, cloves, and ginger.