Is Baking Powder Gluten-Free?

From The New Day Notebook · Facts last checked October 21, 2026 · General information, not medical advice

Most baking powder is gluten-free. This common pantry staple gives lift to baked goods, and the majority of products available use cornstarch, which does not contain gluten. However, it is not guaranteed to be gluten-free, so it is always essential to check the product’s label before using it.

Understanding the simple components of baking powder can help you confidently choose a safe option for your gluten-free baking.

Baking powder and gluten at a glance

Why baking powder is usually gluten-free

Baking powder is a simple mixture of ingredients that create a chemical reaction for leavening. It contains three parts: an alkali (baking soda), an acid, and a starch. The starch serves as a buffer to prevent the acid and base from reacting prematurely and to absorb moisture.

In the vast majority of baking powders sold in the United States, the starch used is cornstarch. Since corn is a gluten-free grain, a baking powder made with cornstarch is gluten-free. This is why you will find that most options on the shelf are suitable for a gluten-free diet.

Where gluten can sneak in

While less common, some baking powders might use a different starch as the buffer ingredient. The main source of gluten to look out for would be wheat starch. If wheat starch is used, the baking powder is not gluten-free.

U.S. Food and Drug Administration regulations require that packaged foods clearly declare wheat as a major allergen on the label. This makes it easier to spot. However, these specific labeling rules do not apply to barley or rye, so reading the full ingredient list is a good practice. Looking for a gluten-free label is the most straightforward way to confirm a product meets the standard for gluten-free foods.

Shopping, cooking and eating out

When shopping for baking powder, your best tool is the product label. Look for two key things:

• A gluten-free claim on the packaging. In the United States, foods with this label must contain less than 20 parts per million (ppm) of gluten.
• The ingredient list. Check to see what kind of starch is used. If it lists cornstarch, potato starch, or another gluten-free starch, it is a good sign. Avoid any product that lists wheat starch.

When baking at home, use dedicated measuring spoons for gluten-free ingredients to avoid cross-contact with flour. If you are eating baked goods prepared by others, it is always a good idea to ask what ingredients were used, including the specific baking powder, if you need to maintain a strict gluten-free diet.

When to loop in your doctor or dietitian

For individuals with celiac disease, a strict gluten-free diet is medically necessary. If you have questions about reading labels or managing your diet, speak with your doctor or a registered dietitian. You should not start a gluten-free diet before completing medical testing for celiac disease, as the tests require gluten to be present in your system for an accurate result.

• If you think gluten is making you unwell, ask about celiac disease testing before cutting gluten out: testing needs gluten in the diet
• If you have celiac disease and still have symptoms on a gluten-free diet
• If you are unsure whether oats, wheat starch or a specific ingredient suits you
• For help planning a gluten-free diet that still meets your nutrition needs

Sources

• U.S. Food and Drug Administration: Gluten-Free Labeling of Foods

Last checked October 21, 2026. Recipes and ingredients change: always read the current label.