How to Double a Recipe

Learn how to double a recipe whether you’re baking or cooking! Most recipes can be doubled easily by just knowing a bit of math – and I’ve done all the calculations for you. Download the free printable and never worry about doubling again!

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Ever wondered how to double a cookie recipe, or a cake, or maybe dinner? I’m going to share my top tips for successfully doubling a recipe today.

1. How do you double when baking?

For most baking recipes, you can simply double the ingredients. Eggs, flour, sugar, butter, even vanilla extract, can be doubled for almost any recipe you make. Just times the amounts by 2 – and be sure to do it for ALL the ingredients (don’t forget!)

Tip: do the calculations (write down the new measurements) before you get started so you don’t accidentally forget to double one of them.

2. Know your fractions

Don’t worry, if that makes you break out into a sweat thinking about 3rd grade. I have a FREE printable for all the fractions, and they’re also listed here. Use this as your guide for doubling any recipe.

Original AmountDouble Amount
⅛ tsp¼ tsp
¼ tsp½ tsp
½ tsp1 tsp
1 tsp2 tsp
1 Tbsp2 Tbsp
¼ cup½ cup
⅓ cup2/3 cup
½ cup1 cup
2/3 cup1 ⅓ cups
¾ cup1 ½ cups
1 cup2 cups

3. Know if your mixer/bowl is big enough

Depending on what you’re doubling make sure your bowl or mixer can hold it all. If not, just make the recipe twice.

4. Working with doubled dough

If you’re making a yeasted dough or a rolled cookie, make sure to divide the dough in half before working with it. A doubled recipe can get pretty big and will be hard to roll out or knead.

5. Don’t double the spices right away

When you’re doubling a baked recipe, you can simply double any cinnamon or spices, even baking soda or powder (more on that later). However, when you’re cooking it’s a different story.

Tip: when doubling spices in a recipe, start by multiplying by 1.5 at first. Things like salt, cayenne, pepper, etc, can get too strong if they’re outright doubled. (For example, if a recipe calls for 1 teaspoon salt, add 1 ½ teaspoons instead of 2 when doubling.)

6. Cooking and baking time will be different

When you double a batch of cookies it doesn’t take double the time to bake them, it just makes more of them. Doubling a cake will make it take longer to bake, but it won’t double the time.

Tip: when doubling a recipe, cook/bake it for the time listed and start watching it after that to see gauge how much more time you’ll need to add.

7. Know the right size pan to use

When doubling a baking recipe, you’ll need to be sure and use the correct pans. Sometimes you can substitute a bigger pan and sometimes you’ll just need additional of the same size pan (i.e. when you’re making a layer cake). Check out my pan size equivalent post to know what size pans to use.

8. Do you double baking powder or baking soda?

For simple doubling of recipes (you’re making two batches of cookies instead of just one) then yes, it’s fine to double the baking powder or soda. But if you’re really scaling up a recipe you’ll need to adjust the amount.

Other Tips and FAQ

  • Is it OK to double a cake recipe? Yes, but make sure to use multiple pans, not just a bigger one. Otherwise it might bake unevenly in the center.
  • Can I just double your cookie recipes? Yes most of them can easily be doubled, no problem at all. Just use the cheat sheet for amounts!
  • How much time do you add when doubling a recipe? That really depends on what you’re doubling and how it’s being baked (pans, etc). Cookies will take the same amount of time, you just need more cookie sheets. But if you’re doubling a cake and using a bigger pan, it’ll take longer.
  • When doubling a cookie recipe and re-using cookie sheets, be sure to let them cool in between batches!
  • How do you scale a recipe for production? While it’s not as easy as just doubling, you can easily figure out how much you need per person and scale things up. (If a batch of cookies makes 24 and you need 96 then you need to 4x the recipe, but that brings it’s own set of challenges.)
  • Rule of thumb: only double recipes. If you need to do more than that, consider making the recipe more than once to get what you need.

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