Irony is the Shackles of Youth

You can substitute baking powder for baking soda if you use about 3x as much baking powder in the recipe. That's because baking powder is basically baking soda with cream of tartar mixed in. However, you cannot generally do the reverse and substitute baking soda directly for baking powder. She basically added 3 teaspoons of baking soda, which is already more powerful than baking powder, to the recipe.

It tasted kind of like really bad pancake flavored toothpaste.