Frequently Asked Questions

PlainSubstitute is a free database of tested cooking and baking ingredient substitutions. We provide accurate ratios, context guidance, and dietary compatibility for hundreds of common ingredients.

Yes. All ratios are based on culinary standards and food science. Each substitution also includes a quality rating (1–5) so you know how well it performs in practice.

Yes, though baking substitutions are more sensitive than cooking. We always note when a substitution works best for baking vs. general cooking, and flag when results may differ significantly.

Dietary tags (vegan, dairy-free, gluten-free, egg-free, nut-free, paleo, keto, soy-free, peanut-free) are assigned based on the substitute's actual ingredients. We verify these against standard dietary guidelines.

A lower quality rating means the substitution works in a pinch but may change flavor, texture, or appearance. We rate them honestly so you can make an informed choice.

We review and expand our substitution database regularly. New ingredients are added based on user needs and culinary trends.

Yes, completely free. We support the site through advertising.