A Guide to Types of Sugar and When to Use Each One

Most people think sugar's only job is sweetness, so they cut back on it in recipes and wonder why the cake turns out dry, pale, and dense. Sugar in baking actually serves four functions, not just one.

The Four Functions

1. Sweetness — The obvious role.

2. Moisture — Sugar attracts and retains water, so cakes stay soft for days. Low-sugar cakes dry out in a single day.

3. Color and Flavor — Sugar caramelizes and takes part in the Maillard reaction, which is the source of that golden color and deep flavor.

4. Texture — Beating sugar with butter creates air pockets thanks to the sharp edges of its crystals, and these pockets are what keep cakes light and fluffy.

The Types in Detail

Granulated White Sugar: Almost pure sucrose. The foundation for everything — cakes, cookies, beverages, and caramel. Its medium-sized crystals have sharp edges that cream well with butter.

Caster Sugar (Superfine): The same sugar ground finer. It dissolves much faster, making it ideal for meringues, soufflés, and sponge cakes. A quick substitute: pulse regular sugar in a blender for just 10 seconds.

Powdered Sugar (Confectioners'): Ground extremely fine with 3% cornstarch added to prevent clumping. Used for glazes, frostings, and dusting. It cannot be used for creaming with butter because the particles are too fine to create air pockets.

Brown Sugar: White sugar combined with molasses. Light brown contains 3.5% molasses and dark brown contains 6.5%. Molasses is slightly acidic, so it reacts with baking soda and holds more moisture — which is why brown sugar cookies bake up soft and chewy while white sugar cookies turn out crispy.

Raw Sugar (Demerara/Turbinado): Large brown crystals that dissolve slowly. Great for sprinkling on top of baked goods before the oven — it adds a distinct crunch.

Honey: Around 25% sweeter than sugar and retains far more moisture. It makes baked goods softer and darker, and browns much faster, so lower your oven temperature by 10 degrees.

Molasses: A byproduct of sugar refining, dark and slightly bitter, rich in iron. Used in gingerbread and dark, spiced cakes.

Glucose Syrup: Prevents sugar crystallization. Essential in ice cream, caramel, and Middle Eastern sweets.

Substitution Chart

• Need brown sugar and only have white? 1 cup white sugar + 1 tbsp molasses (or dark cane syrup), mixed with a fork.
• Need powdered sugar? 1 cup white sugar + 1 tbsp cornstarch in a blender until completely smooth.
• Need caster sugar? Pulse regular sugar for 10 seconds.
• Want to substitute sugar with honey? Use 3/4 of the amount, reduce the liquid in the recipe by 1/4 cup, and reduce the oven temperature by 10 degrees.

Reducing Sugar — How Much Is Safe?

You can safely reduce sugar by up to 25% without noticing a major change in texture. Beyond that, you will find:

• The cake is drier and stales faster.
• The color is lighter with a pale top.
• The texture is heavier and less airy.
• The shelf life of your bake is significantly shorter.

And for some things, you cannot reduce sugar at all: meringue (sugar stabilizes the egg whites), caramel, jams (sugar acts as a preservative), and ice cream (sugar prevents it from freezing rock-hard).

Artificial and Natural Substitutes

Stevia: Natural, 200–300 times sweeter than sugar, and zero calories. The downside is that it provides no volume, moisture, or browning, so it does not work well on its own in baking — but it is great in drinks.

Erythritol: A sugar alcohol, about 70% as sweet as sugar with virtually zero calories. It offers bulk similar to sugar so it works in baking, but it leaves a cooling sensation on the tongue.

Coconut Sugar: Slightly lower glycemic index, but almost identical calories to sugar. Do not treat it as "healthy" — it is simply sugar with a caramel flavor.

Pureed Dates: An excellent substitute in cakes and brownies — providing sweetness, moisture, and fiber. Use 1 cup date paste in place of 1 cup sugar and reduce the added liquid slightly.

Storage

• White sugar lasts for years in an airtight container — it is a natural preservative on its own.
• Brown sugar hardens when it dries out. Store it in an airtight container with an apple slice or a piece of bread for a day, or microwave it for 20 seconds.
• Powdered sugar absorbs moisture and clumps easily — always sift before using.
• Honey crystallizes naturally — place the jar in warm water for 10 minutes and it will return to liquid.

Caramel — Sugar Temperatures

As sugar heats up, it goes through distinct stages, and each stage has its culinary purpose:

• 115 degrees (Soft Ball): For fudge, frostings, and fondant.
• 125 degrees (Hard Ball): For Italian meringue, nougat, and marshmallows.
• 145 degrees (Hard Crack): For lollipops, hard candies, and brittle.
• 160–175 degrees (Caramel): The color shifts from golden to rich amber, and the flavor takes on a pleasant, mild bitterness.
• Above 180 degrees: Burnt and bitter — discard it and start over.

Two golden rules for caramel: Never stir with a spoon while it melts (swirl the pan instead) to prevent crystallization, and have your cream or butter ready next to you because the color changes in seconds.

Summary

Sugar is more than just sweetness — it brings moisture, color, and structure. Brown sugar makes cookies chewy, white makes them crisp, caster is best for meringue, and powdered for glazes. Reducing sugar by up to 25% is safe; beyond that, your final result will change.