Let’s paint a few scenarios, shall we? Situation one: You’re making a gravy or a fruit pie filling, and you accidentally grab baking powder instead of cornstarch. Your sauce will bubble up like a science fair volcano, taste metallic, and never thicken. You’ll be standing there stirring forever, wondering why your life is falling apart.
Situation two: You’re baking a cake, and you swap cornstarch for baking powder. That cake will be dense, flat, and chewy—like a pancake that gave up on life. No lift, no fluff, just regret. You might as well eat the box.
I once made “puffy” cookies using cornstarch thinking it was baking powder. They came out like sad little edible coasters. My friends were polite, but I saw them trying to break them with the side of a spoon. Awkward.
Is Baking Powder Similar To Cornstarch at Connie Talbert blog
The One Exception (Because Of Course There Is)
Okay, I can’t lie to you completely. There is a very specific, niche scenario where cornstarch kind of acts like baking powder’s distant cousin. In some recipes for shortbread cookies or cake flour substitutes, a small amount of cornstarch is added to tenderize the gluten, making baked goods softer. But that’s not leavening—that’s texture control.
Also, if you’re out of baking powder, you can’t just double the cornstarch and pray. That won’t work. You need to mix baking soda with an acid (like lemon juice or vinegar) to fake it. Cornstarch will just sit there, confused and starch-y.
So don’t let that one weird TikTok hack fool you into thinking they’re interchangeable. Stay strong, stay curious, but also stay separate.
