You can use erythritol instead of granulated sugar at a ratio of 1 1/3 cups per cup of sugar. That is the direct answer, and it is the number to use. But sugar is not just sweetness in a recipe — it is moisture, browning, spread, structure and keeping quality all at once. It feeds yeast, tenderises crumb, helps a cookie spread, makes a crust crisp, and keeps a cake moist for days. Every sweetener does those jobs differently, so swapping one for another changes more than the taste, and this page explains what changes and by how much.
Erythritol brings its own character to the bake. Sweeteners differ in sweetness, moisture and browning; liquid sweeteners need the recipe's liquid reduced. In a strongly flavoured bake — a spice cake, a gingerbread, a dark brownie — that character is an asset. In a delicate bake — a vanilla sponge, a meringue, a shortbread — it can be the thing that gives the swap away. The ratio below is the starting point; the rest of this page is about using it well.
The ratio, in a table
The table below converts granulated sugar to erythritol for the amounts you are most likely to meet. The rule is always the same: 1 1/3 cups per cup of sugar.
| Granulated sugar called for | Erythritol to use | Notes |
|---|---|---|
| 1/4 cup | 1/3 cup | |
| 1/3 cup | 7 tablespoons + 1/4 teaspoon | |
| 1/2 cup | 2/3 cup | |
| 2/3 cup | 14 tablespoons + 3/4 teaspoon | |
| 3/4 cup | 1 cup | |
| 1 cup | 1 1/3 cups | |
| 1 1/2 cups | 2 cups | |
| 2 cups | 2 2/3 cups |
By weight, one cup of granulated sugar is about 198 g (King Arthur Baking, spooned and levelled). Our density table does not list a grams-per-cup figure for erythritol, so no weight is given for it here — measure it by volume and, if the recipe is sensitive, weigh a trial cup yourself and note the number. All weights here are approximate; verify with a kitchen scale when the bake matters.
King Arthur lists 198 g per cup; USDA FoodData Central rounds granulated sugar to 200 g per cup. The 2 g difference is rounding, not a real disagreement.
Worked examples
Example 1: A vanilla sponge cake
A sponge cake is the hardest test of a sweetener swap, because the crumb is delicate and the flavour is mild. A recipe calls for 1 cup of granulated sugar. Using the ratio, that becomes 1 1/3 cups. Cream the butter and sweetener as usual, then add the eggs one at a time and fold in the flour. Bake at the same temperature, but check the cake five minutes early, because a different sweetener can brown faster or set at a different rate. If the sponge is a little denser or a little darker than usual, that is the swap showing — next time, try the swap in a more strongly flavoured cake first.
Example 2: Chocolate chip cookies
Cookies show a sweetener swap in the spread and the chew. A recipe calls for 3/4 cup of granulated sugar. Using the ratio, that becomes 1 cup. Cream the butter and sweetener until light, add the eggs and vanilla, then mix in the flour and chocolate chips. Chill the dough for 30 minutes before baking — chilling matters more than usual here, because a different sweetener changes how the dough hydrates and spreads. Bake one test cookie first: if it spreads too much, chill the dough longer; if it stays too thick, flatten the balls slightly. The chocolate will mask most of the flavour difference.
Example 3: A banana bread
Banana bread is the most forgiving place to try a sweetener swap, because the banana carries the flavour and the crumb is meant to be moist. A recipe calls for 1 cup of granulated sugar. Using the ratio, that becomes 1 1/3 cups. Stir the batter until it just comes together, pour it into the tin, and bake as usual. The loaf will be a little different in sweetness and a little different in moisture, but in a banana bread those differences read as character rather than a mistake. This is the recipe to start with if you have never made this swap before.
What changes in the result
Four things change when you swap erythritol for granulated sugar. First, the sweetness: Sweeteners differ in sweetness, moisture and browning; liquid sweeteners need the recipe's liquid reduced. Sweetness is not the same as sugar — a sweetener can be sweeter or less sweet than sugar at the same weight, and the ratio on this page corrects for that, but your palate may still notice the difference, especially in a lightly sweetened recipe. Second, the moisture: a liquid sweetener adds water the recipe did not ask for, and a dry sweetener may not hold moisture the same way, so the crumb can come out wetter or drier. Third, the browning: different sweeteners caramelise at different temperatures, so the bake can brown faster or stay pale. Fourth, the texture: sugar controls spread in cookies, tenderness in cakes and crispness in crusts, and every substitute shifts that balance a little.
When not to substitute
Do not swap 1:1 in candy-making, meringues or jam, where sugar's exact chemistry matters. In practice that means: do not make this swap in candy-making, where sugar's exact boiling behaviour is the whole recipe; do not make it in meringues, where sugar stabilises the egg white foam and a substitute can make the meringue weep or collapse; and do not make it in jam or preserves, where sugar is the preservative and getting it wrong is a food-safety issue, not just a taste issue. Be cautious in shortbread and in any recipe where sugar is a large share of the weight. And if the recipe is for someone managing blood sugar, remember that a different sweetener is not automatically a safe one — check with the person, and do not present a swap as a health claim.
Practical guidance
Measure the sweetener the way the recipe expects it to be measured. Granulated and caster sugar are spooned and levelled; brown sugar is packed firmly into the cup; liquid sweeteners are measured in a liquid jug at eye level. If you weigh instead — and you should, when the bake matters — the weights on this page are approximate, so verify with a kitchen scale and note your own number for next time. Store the substitute in an airtight container in a cool, dry place; liquid sweeteners crystallise if they get cold, so keep them at room temperature and warm the jar briefly in hot water if crystals form.
All conversions on this page are approximate. A kitchen scale is the most reliable tool you own: weigh the substitute, note the number that works for your recipe, and use it next time. If a bake matters — a birthday cake, a loaf for guests — test the swap first in a small, forgiving recipe before you commit to the important one.
Frequently asked questions
How much erythritol do I use instead of 1 cup of granulated sugar?
Use 1 1/3 cups — that is the ratio 1 1/3 cups per cup of sugar applied to one cup. All amounts on this page are approximate, so if the bake is sensitive, weigh the substitute and note your own number for next time.
Is erythritol sweeter than granulated sugar?
Sweeteners differ in sweetness, moisture and browning; liquid sweeteners need the recipe's liquid reduced. Sweetness is not the whole story, though: a sweetener can match sugar's sweetness and still change the bake, because sugar also controls moisture, browning, spread and texture. Judge the swap on the finished bake, not on a spoonful of the sweetener, and adjust the amount slightly next time if the result is too sweet or not sweet enough.
Will my cake brown more with erythritol?
Possibly — and it depends on the sweetener. Liquid sweeteners and those with more fructose tend to brown faster, so a cake can look done before the centre is set. Check with a skewer rather than by colour, and if the top is browning too fast, cover the tin loosely with foil for the last part of the bake. If your substitute browns more slowly, the cake may look pale when it is ready — again, trust the skewer, not the colour.
Can I use erythritol in cookies?
Yes, but expect the cookies to behave differently. Sugar controls spread: it melts in the oven and lets the dough spread before it sets. A substitute changes that balance, so the cookies may be thicker or thinner than the recipe intends. Chill the dough for 30 minutes and bake one test cookie first. If the cookies spread too much, chill the dough longer; if they stay too thick, flatten the balls slightly. The flavour difference will be small under the chocolate or spice.
Can I use erythritol in meringue or candy?
No — not safely, and not with a good result. Meringue depends on sugar to stabilise the egg-white foam, and candy depends on sugar's exact boiling behaviour; a substitute changes both, and the result can be a weeping meringue or a candy that never sets. Jam is the same: sugar is the preservative, and getting it wrong is a food-safety issue. For those recipes, use the sugar the recipe calls for, or find a recipe written for the substitute from the start.
Will the texture change with erythritol?
Yes, a little. Sugar tenderises crumb, controls spread and holds moisture, and every substitute shifts that balance. A liquid sweetener usually makes a moister, softer crumb; a dry substitute can make a drier one; a high-intensity sweetener adds sweetness without any of sugar's bulk, so the bake can be drier and less tender. The changes are small in a strongly flavoured bake and most noticeable in a plain cake or a cookie. If the texture matters, try the swap first in a forgiving recipe such as banana bread or brownies.