How to Substitute Confectioners Sugar for Granulated Sugar

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Here’s the cool part: because confectioners' sugar is lighter and fluffier, a cup of it weighs less than a cup of granulated sugar. Think of it like substituting cotton candy for pop rocks—both are sweet, but they pack differently. For most baking, by weight, 1 cup of granulated sugar equals about 1 ¾ cups of confectioners' sugar. Use a kitchen scale if you have one—it’s your best friend here.

But hey, what if you only have measuring cups? No stress. Just use a gentle scoop and level it off. Don’t pack it down like you’re making a sandcastle; you want it airy. A packed cup of powdered sugar will throw off your baking math—and nobody wants a flat cake.

When It Works Like a Charm (and When It Doesn’t)

This swap shines brightest in no-bake recipes like truffles, frostings, or glazes. Why? Because the cornstarch in confectioners' sugar acts like a silent little helper, thickening things up and giving them a silky texture. Ever made a buttercream that felt grainy? That’s granulated sugar being stubborn. Powdered sugar? It dissolves instantly, like magic dust.

But if you’re baking something that needs structure—like a fluffy sponge cake or crispy meringues—stick with granulated sugar. The cornstarch can make baked goods feel tender (which sounds nice), but too much might make them dense or gummy. Imagine trading your trampoline for a memory foam mattress—comfy, but not bouncy.

Sugar Free Powdered Sugar! 2 Ingredients! Mind Over Munch - YouTube