Rice Flour vs Corn Flour for Gluten-Free Baking: Nutrition Data
Choosing the right gluten-free flour can feel overwhelming, but grounding the decision in real nutrition data makes it much easier. Both white rice flour and whole-grain yellow corn flour are pantry staples for gluten-free bakers, yet they behave differently in recipes and deliver meaningfully different nutrient profiles. Here is an honest, data-driven look at what each flour brings to your table.
Nutrition at a Glance: Side-by-Side Comparison
All values below are per 100 g of flour, sourced directly from USDA FoodData Central (see the data source section below).
| Nutrient | White Rice Flour | Whole-Grain Corn Flour (Yellow) |
|---|---|---|
| Energy | 359 kcal | 361 kcal |
| Protein | 6.94 g | 6.93 g |
| Total Fat | 1.3 g | 3.86 g |
| Carbohydrate | 79.8 g | 76.8 g |
| Dietary Fiber | 0.5 g | 7.3 g |
| Iron (Fe) | 0.22 mg | 2.38 mg |
| Magnesium (Mg) | 22.9 mg | 93.0 mg |
| Potassium (K) | 75.0 mg | 315 mg |
| Zinc (Zn) | 1.19 mg | 1.73 mg |
| Calcium (Ca) | 6.0 mg | 7.0 mg |
| Sodium (Na) | 5.0 mg | 5.0 mg |
Breaking Down the Key Differences
Fiber: The Biggest Gap
This is where the two flours diverge most dramatically. White rice flour contains just 0.5 g of dietary fiber per 100 g, while whole-grain corn flour delivers 7.3 g — nearly fifteen times as much. For gluten-free eaters who already find it challenging to hit daily fiber targets (since many gluten-free products are made from refined starches), this gap is significant. Higher-fiber baked goods tend to slow digestion, which can help with feelings of fullness and more gradual energy release after a meal — useful context for anyone trying to manage their energy levels throughout the day.
Iron: A Meaningful Difference for GF Diets
People following a gluten-free diet sometimes struggle with iron intake, partly because conventional wheat flour is routinely enriched with iron and partly because some intestinal conditions that prompt a gluten-free diet affect nutrient absorption. The data shows a stark contrast here: rice flour (unenriched) provides only 0.22 mg of iron per 100 g, while whole-grain corn flour provides 2.38 mg — more than ten times as much. Incorporating corn flour into your baking rotation is a practical, food-first way to contribute to iron intake without relying on supplements.
Magnesium and Potassium: Corn Flour Leads Again
Whole-grain corn flour contains 93.0 mg of magnesium per 100 g versus 22.9 mg in white rice flour, and 315 mg of potassium compared to 75.0 mg. Both minerals are important in general health and are commonly under-consumed. Because the corn flour retains its whole-grain bran and germ, these minerals remain intact — a reminder that the “whole-grain” designation is doing real nutritional work here.
Protein: Nearly Identical
Interestingly, both flours offer almost the same amount of protein: 6.94 g per 100 g for rice flour and 6.93 g for corn flour. Neither is a high-protein flour, so gluten-free bakers looking to boost protein in a recipe will still want to consider additions like eggs or legume-based flours alongside either option.
Calories and Carbohydrates: Very Similar
At 359 kcal and 361 kcal per 100 g respectively, the two flours are virtually identical in caloric density. Rice flour is slightly higher in carbohydrates (79.8 g vs 76.8 g), and because so little of those carbohydrates come from fiber, a larger proportion is available as starch. This is relevant for blood-sugar awareness: corn flour’s higher fiber content means its total starchy carbohydrates are tempered somewhat, though this article makes no medical claims about glycemic response.
What This Means for Your Baking
Rice Flour: Neutral, Refined, and Reliable
White rice flour has a mild, almost tasteless profile and a very fine texture. This neutrality makes it exceptional for baked goods where you want a delicate crumb without any competing flavor — think sandwich bread, vanilla cake layers, crepes, or light pastry. Its low fat content (1.3 g per 100 g) means it does not contribute much richness on its own, so recipes usually rely on added butter, oil, or eggs for tenderness. Its low fiber content also means less interference with gluten-free binding agents like xanthan gum, making it easy to work with for beginners.
Corn Flour: Earthy, Wholesome, and Nutrient-Dense
Whole-grain corn flour brings a distinctly earthy, slightly sweet corn flavor and a denser texture. Its higher fat content of 3.86 g per 100 g (largely from the germ) contributes a subtle richness. It works beautifully in cornbread, tortillas, tamales, polenta-style cakes, muffins, and savory pancakes. Because of its stronger flavor, it pairs best with recipes that complement or celebrate a corn taste rather than mask it. The higher fiber and mineral content make it the more nutritionally complete choice, but its boldness means it is not always the right flour to substitute one-for-one in delicate recipes.
How to Use This in Your Kitchen
- Use rice flour when you need a neutral base for baked goods where texture and mild flavor are priorities — cakes, cookies, crepes, and flour blends designed to mimic all-purpose flour.
- Use corn flour when flavor and nutrition density are the goal — cornbread, savory muffins, tortillas, and hearty breakfast pancakes all benefit from its mineral content and fiber.
- Blend them for a middle ground: combining rice flour’s fine texture with corn flour’s fiber and minerals can improve both the nutritional profile and the structure of a baked good.
- Label-check iron enrichment: the rice flour in this dataset is specifically unenriched (FDC ID 790214). Enriched rice flour products may have higher iron values — always check the label of the specific brand you buy.
- Store corn flour carefully: the higher fat content (3.86 g per 100 g) means whole-grain corn flour can go rancid faster than rice flour. Keep it in an airtight container in the refrigerator or freezer.
Frequently Asked Questions
Which flour has more fiber?
Whole-grain corn flour has significantly more fiber — 7.3 g per 100 g — compared to white rice flour at just 0.5 g per 100 g. If fiber is a priority in your diet, corn flour is the clear winner between these two options.
Are the calorie counts very different?
No. White rice flour contains 359 kcal per 100 g and whole-grain corn flour contains 361 kcal per 100 g. For practical baking purposes, these two flours are interchangeable in terms of caloric contribution.
Which flour has more iron?
Whole-grain corn flour provides 2.38 mg of iron per 100 g. White rice flour (unenriched) provides only 0.22 mg per 100 g. For those monitoring iron intake on a gluten-free diet, corn flour is a substantially better source based on this data.
Do they have the same amount of protein?
Almost exactly the same: rice flour provides 6.94 g of protein per 100 g and corn flour provides 6.93 g. Neither flour is a significant protein source on its own, so additional protein-rich ingredients are worth considering regardless of which you choose.
About the Data
All nutrition figures in this article come exclusively from USDA FoodData Central, the official U.S. government food composition database, available at fdc.nal.usda.gov. The specific entries used are Flour, rice, white, unenriched (FDC ID 790214) and Corn flour, whole-grain, yellow (FDC ID 170290). Data was retrieved on 2026-07-21. It is important to note that actual nutrient values can vary by brand, batch, growing conditions, and processing method. Always consult the nutrition label on the specific product you purchase for the most accurate information.