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The Baking Science Blog

Deep-dives on ingredients, substitution science, and the chemistry behind every great bake

Quick Substitute Answers
Quick Guide

Baking Powder Substitute

Emergency ratio plus a practical conversion table for common baking amounts.

Get the ratio →
Quick Guide

Egg Substitute for Baking

Choose aquafaba, flax, fruit purée, or another option based on what the egg does in your recipe.

Compare egg swaps →
Quick Guide

Buttermilk Substitute

Milk plus acid, thinned yogurt, and dairy-free options with acidity notes.

See buttermilk swaps →
Quick Guide

Butter Substitute for Baking

Best swaps for melted butter, creaming, quick breads, cakes, cookies, and pastry.

Compare butter swaps →
Quick Guide

Cornstarch Substitute

Options for sauces, fillings, baking, and coatings with practical starting ratios.

Compare starches →
Quick Guide

Cream of Tartar Substitute

Choose the right acid or alternative for egg whites, leavening, and cookies.

Choose a substitute →
Make the substitute
Ingredient how-to

What Is Aquafaba? How to Use Chickpea Liquid

Drain, measure and whip aquafaba; see egg ratios, best uses and recipes that need a different approach.

Learn the method →
Ingredient how-to

How to Make a Flax Egg

Ground flaxseed, water and resting time, with guidance on where the gel binds and where it fails.

Make a flax egg →
Major Ingredients — Complete Substitution Guides
Flour
Major Ingredient

🌾 Flour Substitutes: How Different Flours Behave

All-purpose, bread and cake flour, plus alternative flours. Learn which swaps are straightforward and which need recipe-specific adjustments.

📅 May 2026  ·  10 min read
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Butter
Major Ingredient

🧈 Butter vs Oil vs Shortening in Baking

Compare how butter, oil, shortening and other fats change moisture, tenderness, flavor, creaming and texture in different bakes.

📅 May 2026  ·  9 min read
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Sugar
Major Ingredient

🍬 Sugar Substitutes: Which Ones Actually Work

Honey, maple syrup, coconut sugar, erythritol, and more. How each one affects texture, browning, and moisture — with exact conversion ratios.

📅 April 2026  ·  9 min read
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Eggs
Major Ingredient

🥚 Egg Replacements Explained: Structure, Binding & Lift

Flax, aquafaba, silken tofu, mashed banana — chosen by what the egg is actually doing in your recipe. Binding, leavening, and moisture substitutes covered separately.

📅 April 2026  ·  10 min read
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Milk
Major Ingredient

🥛 Milk & Dairy Substitutes: Ratios & Recipe Effects

Whole milk, buttermilk, heavy cream and sour cream alternatives, with practical ratios and notes on acidity, moisture and texture.

📅 March 2026  ·  9 min read
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Protein powder with a measuring scoop
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💪 High-Protein Baking: Protein Powder, Egg Whites & Yogurt

How protein powder, egg whites and Greek yogurt can change baked goods, with cautious starting points and texture notes.

📅 August 2026  ·  6 min read
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Minor Ingredients — Deep-Dives on the Details
Vanilla beans
Minor Ingredient

🌸 Vanilla Extract Substitutes: What to Use and When

Vanilla bean paste, maple syrup, almond extract, bourbon — ranked and explained. Includes which substitute is best for meringue vs cookies vs custard.

📅 May 2026  ·  7 min read
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Baking powder
Minor Ingredient

⚗️ Baking Soda & Baking Powder Substitutes

Practical leavener conversions, a DIY baking powder formula, self-rising flour notes, and the chemistry behind the swaps.

📅 April 2026  ·  7 min read
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Salt crystals
Minor Ingredient

🧂 Salt in Baking: Why It Matters and What to Use Instead

Salt types and conversions (table vs kosher vs flaky), low-sodium alternatives, and what actually happens when you skip or reduce salt in bread and sweet bakes.

📅 April 2026  ·  6 min read
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Whisking egg whites to stiff peaks
Minor Ingredient

🍋 What Cream of Tartar Does in Baking & Meringue

Meringue stabilizer, leavening acid, candy crystallization prevention, snickerdoodle flavor — the right substitute depends on which role cream of tartar is playing.

📅 March 2026  ·  6 min read
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Corn kernels
Minor Ingredient

🌽 How Cornstarch Works: Thickening, Baking & Coating

Learn how cornstarch and alternative starches behave in pie filling, baking, gravy, and crispy coatings, with a practical comparison table.

📅 March 2026  ·  7 min read
Read article →