how many grams in a cup of baking powder?

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things people ask

• Would any home recipe ever call for a cup of baking powder?
  Almost never. Baking powder is a leavener used at roughly 1 teaspoon per cup of flour, so even a five-loaf batch tops out near 2 tablespoons. Cup-scale amounts mostly appear in bakery production sheets, where 192 g per cup is the conversion you'd use to weigh out a daily mix.
• How do I weigh out baking powder when making my own?
  Homemade baking powder is typically 1 part baking soda to 2 parts cream of tartar by weight, with a little cornstarch to keep it dry. If you scale to a full cup of finished mix (192 g), you'd use roughly 64 g baking soda, 128 g cream of tartar, and a tablespoon of cornstarch stirred together.
• Does baking powder pack down in the cup over time?
  Yes. A fresh, fluffy cup measures close to 192 g, but a tin that's been sitting in a humid pantry can settle and read 200-210 g per cup because the powder absorbs moisture and clumps. Stir or sift before measuring at any scale, and replace baking powder once it's been open six months.

related conversions

• Baking Powder: tablespoons to grams
• Baking Powder: teaspoons to grams
• Baking Powder guide