Granulated Sugar vs. Caster Sugar: Which Is Better for Sweetening Cakes?

Last Updated Feb 21, 2025

Granulated sugar and caster sugar both sweeten cakes but differ in texture and dissolving speed. Caster sugar has finer crystals that dissolve quickly, creating a smoother batter and lighter crumb. Granulated sugar adds slight graininess, which can affect cake texture but works well for denser recipes.

Table of Comparison

Aspect Granulated Sugar Caster Sugar
Texture Coarse crystals Fine, powdery crystals
Dissolving Speed Slower in batters and liquids Dissolves quickly, ideal for smooth texture
Use in Baking Suitable for general cakes and cookies Preferred for delicate cakes and meringues
Sweetness Level Standard sweetness Slightly higher perceived sweetness due to fine grain
Availability Widely available May be less common, specialty stores

Understanding Granulated Sugar and Caster Sugar

Granulated sugar consists of larger, coarser crystals that dissolve slowly, making it ideal for creaming with butter in cake recipes to create a light texture. Caster sugar, with its finer crystals, dissolves quickly and blends smoothly into batters, ensuring an even sweetness and tender crumb. Choosing the right sugar type impacts the cake's texture and moisture, with caster sugar preferred for delicate cakes and granulated sugar suited for denser, more textured cakes.

Texture Differences: Granulated vs Caster Sugar

Granulated sugar has larger, coarser crystals that dissolve more slowly in cake batter, often resulting in a slightly grainier texture. Caster sugar features finer crystals that blend quickly and evenly, producing a smoother, more delicate crumb in cakes. Choosing caster sugar enhances the texture by creating a tender, moist cake with improved aeration and rise.

Dissolving Properties in Cake Batters

Granulated sugar has larger crystals that dissolve more slowly in cake batters, which can result in a coarser crumb and less even sweetness distribution. Caster sugar, with its finer granules, dissolves quickly and thoroughly, leading to a smoother batter and a finer-textured cake. Using caster sugar improves the overall consistency by promoting better aeration and moisture retention during baking.

Impact on Cake Crumb and Structure

Granulated sugar creates a coarser crumb and denser cake structure due to its larger crystal size, which takes longer to dissolve during mixing. Caster sugar, with its finer texture, dissolves more quickly, promoting more even aeration and a lighter, fluffier cake crumb. Choosing caster sugar enhances delicate crumb texture and uniform cake rise compared to granulated sugar.

Flavor Profiles: Does Sugar Type Matter?

Granulated sugar provides a classic sweetness with a slightly coarse texture that dissolves slowly, enriching cakes with a balanced flavor and subtle caramel notes. Caster sugar, finer and faster dissolving, enhances the cake's smoothness and brings a cleaner, more delicate sweetness that can highlight other ingredients without overpowering them. While both sugars sweeten effectively, the choice influences the cake's texture and the perception of flavor nuances, making sugar type a key factor in achieving the desired flavor profile.

Availability and Cost Comparison

Granulated sugar is widely available in most grocery stores and tends to be more affordable than caster sugar, which is a finer grind preferred for delicate cake batters. Caster sugar often demands a slightly higher price due to its specialized texture and limited availability in some regions. Choosing between them depends on the desired cake texture and budget considerations.

Substituting Granulated for Caster Sugar in Recipes

Granulated sugar can be substituted for caster sugar in cake recipes by briefly processing it in a blender or food processor to achieve a finer texture, ensuring even dissolution and a smoother crumb. Using granulated sugar without refining may result in a coarser texture and slightly grainy taste, which can affect the cake's mouthfeel. Adjusting baking time slightly may be necessary since larger sugar crystals dissolve slower, impacting batter aeration and final cake rise.

Why Professional Bakers Prefer Caster Sugar

Professional bakers prefer caster sugar over granulated sugar due to its finer texture, which dissolves more quickly and evenly in cake batters, resulting in a smoother crumb and consistent sweetness. The small crystal size of caster sugar ensures better incorporation with other ingredients, enhancing the cake's moisture and rise during baking. Its superior solubility prevents gritty textures, making it essential for delicate cakes and fine pastries.

Best Cakes for Granulated Sugar vs Caster Sugar

Granulated sugar is ideal for cakes that require a coarser texture, such as classic butter cakes and pound cakes, as it dissolves slowly and helps create a denser crumb. Caster sugar, with its finer crystals, is best suited for light and airy cakes like sponge cakes and chiffon cakes, where quick dissolution contributes to a smooth batter and delicate texture. Choosing the right sugar type directly impacts the cake's moisture, crumb, and overall sweetness balance.

Final Verdict: Which Sugar is Best for Cakes?

Granulated sugar provides a coarser texture that enhances the crumb structure and moisture retention in cakes, making it ideal for traditional recipes. Caster sugar dissolves more quickly, resulting in finer, lighter cakes with a tender crumb and smoother batter integration, especially suitable for delicate sponge cakes. Choosing between granulated and caster sugar depends on the desired cake texture, with caster sugar preferred for light, airy cakes and granulated sugar for denser, more structured cakes.

Granulated sugar vs Caster sugar for sweetening Infographic

Granulated Sugar vs. Caster Sugar: Which Is Better for Sweetening Cakes?


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