Peanut Brittle Recipe | Made in the Microwave! (2025)

Microwave Peanut Brittle is such an easy way to get the homemade peanut brittle you grew up eating. Just a few ingredients, a little time, is all it takes for this traditional holiday dessert recipe. Learn how to make peanut brittle today!

Peanut Brittle Recipe | Made in the Microwave! (1)Peanut Brittle

We are having a “Bake-Swap” For our Church Small Group Tonight and so I pulled out an Old Peanut Brittle Recipe My Great Aunt had sent me a few years ago and decided to give it a try last night. This turned out GREAT and it was sooo easy. Much easier than the last Peanut Brittle Recipe I tried so I wanted to share it with all of you.

Peanut Brittle Recipe | Made in the Microwave! (2)

What Does Baking Soda Do In Peanut Brittle

The baking soda in peanut brittle gives it a really airy and bubbly texture that creates tons of air bubbles in the peanut brittle. This is what gives it that unique crunchy and chewy texture it has, when it pairs next to the butter and syrup.

What Is Peanut Brittle Made Of

  • Corn Syrup
  • Butter
  • Raw Peanuts
  • Sugar
  • Vanilla
  • Salt
  • Baking Soda

Peanut Brittle Recipe | Made in the Microwave! (3)

Why Did My Peanut Brittle Not Get Hard

The key to peanut brittle is ensuring you cook it long enough. If you don’t cook it long enough you will end up with a soft sticky mess that doesn’t harden properly. The mix has to get to the hard crack stage, or else it won’t work.

You will find the strands of sugar harden fast and break easily, instead of feeling sticky.

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Peanut Brittle Recipe | Made in the Microwave! (4)

Peanut Brittle Recipe | Made in the Microwave!

Yield: 10 servings

Prep Time: 10 minutes

Cook Time: 12 minutes

Additional Time: 1 hour

Total Time: 1 hour 22 minutes

Homemade peanut brittle made right in your microwave. This microwave peanut brittle is easy, and tasty. A traditional holiday dessert.

Ingredients

  • 1 Cup White Karo
  • 2 Cup Raw Peanuts
  • 2 Cup Sugar1 tsp. Salt
  • 2 Tablespoon Butter
  • 2 tsp. Vanilla
  • 2 tsp. Baking Soda

Instructions

  1. Start by pouring your karo syrup, raw peanuts, sugar and salt in a 3 quart casserole dish that is microwave safe. Then cook on high for 4 minutes.
  2. Remove from microwave, sti well then cook for an additional 4 minutes. Then repeat, again on stirring and cooking for another 4 minutes.
  3. Then remove again stir well and cook on high an additional two minutes.
  4. Then remove and add in your butter and vanilla extract. Microwave on high for 1 minute.
  5. Gently stir the baking soda in until the mixture is a light and fluffy.
  6. Pour onto a baking sheet that is lined and allow to cool for an hour. Break up and enjoy.

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Nutrition Information:

Yield: 10 servings Serving Size: 1/2 cup
Amount Per Serving:Calories: 188Total Fat: 17gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 12gCholesterol: 6mgSodium: 22910mgCarbohydrates: 5gFiber: 2gSugar: 1gProtein: 8g

Peanut Brittle Recipe | Made in the Microwave! (9)

How Long Will Peanut Brittle Last

Peanut brittle will last two months. Store in an airtight container at room temperature. When it is properly stored you will find it will last right up to about two months. Which is a really long time!

Peanut Brittle Recipe | Made in the Microwave! (10)

How Do You Break Peanut Brittle

Once your peanut brittle has hardened you will take a wooden spoon or the back of a butter knife and gently tap on the brittle. After a bit you will find it will begin to break into chunks. Then you can break into small or large pieces.

You can download the PDF Version of this Peanut Brittle Recipe if you want to print it off and try it for yourself.

Gift Peanut Brittle For The Holidays

I packaged these in Clear Celophane Bags I purchased at Hobby Lobby and I tied them with Some Red & Green Ribbon. Also I added in my Merry Christmas From The Schislers Gift Tags I ordered on Vistaprint!

You can still get the Free Address Labels Offer and use them as Gift Tags Here.

Peanut Brittle Recipe | Made in the Microwave! (11)

What is your Favorite Recipe Idea for the Holidays? I’m thinking we should set up some kind of Recipe Exchange. I think everyone would love to swap recipes… Any Ideas on how to do that??? lol.

Peanut Brittle Recipe | Made in the Microwave! (2025)

FAQs

Why is my microwave peanut brittle chewy? ›

Store your microwave peanut brittle in an airtight container at room temperature. Avoid storing in the fridge because any condensation could make the brittle chewy.

How do you make peanut brittle easy? ›

Melt butter in a saucepan over medium heat. Stir sugar and salt with melted butter to dissolve completely. Remove saucepan from heat, add peanuts, and stir to coat completely; immediately pour onto prepared pan and spread into an even layer. Refrigerate until brittle, at least 30 minutes.

Why didn't my homemade peanut brittle get hard? ›

The main reason why peanut brittle doesn't get hard and have the crunch we expect is because the sugar was not cooked long enough. The sugar needs to be cooked to what is called the hard crack stage, 300ºF.

What does baking soda do to peanut brittle? ›

Be sure to use a candy thermometer to ensure it reaches 300 degrees F or hard crack stage. What does baking soda do to peanut brittle? Adding a little baking soda aerates the peanut brittle causing it to expand slightly for a crunchy texture that won't break your teeth when you chew it.

How do you keep peanut brittle crispy? ›

The candy will attract moisture from the air, making it unpleasantly sticky instead of shatteringly crisp. Once it's completely cool, transfer it to an airtight container.

Can you overcook peanut brittle? ›

If you overcook the brittle, it could be bitter or burnt. If you undercook it, the brittle won't properly set and the end result will be sticky.

How long does homemade peanut brittle last? ›

To store: Once it's completely cooled, store peanut brittle in an airtight container at room temperature. Do not refrigerate as the moisture from the fridge will cause the brittle to soften. Store for 6-8 weeks. To Freeze: Peanut brittle can be frozen and stored up to 3 months.

Can you use parchment paper when making peanut brittle? ›

You will want the cookie sheet to be non-stick. Use parchment paper, a silicone baking sheet or a greased cookie sheet. Spread the peanut brittle as thin as you can. Immediately add your sea salt.

Why is my peanut brittle so thick? ›

If the brittle does not reach a hard crack stage (300F degrees) it will not set up and harden properly. Also, the correct pan size matters. If your pan is too small then the brittle mixture will be too thick and won't be able to harden up properly. If you like it to have a more salty flavor, you can use salted peanuts.

Why is my peanut brittle still soft? ›

Didn't get it hot enough. You have to hit hard crack stage heat or it's not going to harden. From internet: Hard-Crack Stage is a cooking term meaning that a sugar syrup being heated has reached 149 – 154 C (300 – 310 F.) It is a test of how hot a sugar syrup is, and of how much water is left in it.

Why is my peanut brittle not fluffy? ›

It is important to coat cookie sheets with butter and put in the freezer to get them really cold before you need to pour the brittle. After you pour the candy you should put the pans in the fridge or outside if it is cold, so the brittle will set up quickly and stay fluffy.

What makes brittle hard? ›

What Makes it Brittle? The sugar will be cooked to 300ºF (149ºC)—hard crack stage; which when set up would be hard like a lollipop. But peanut brittle is delicate and you can easily bite into it—how? The secret is in the baking soda.

Does the weather have anything to do with making peanut brittle? ›

I've learned that brittle is better when made on a cool, dry day. When I've made the candy on a warmer, humid day, it tends to be a stickier brittle. This is because the brittle takes longer to cool, and it reaches a point where it is no longer evaporating moisture into the air.

Why is microwaved food chewy? ›

When one of those sugar molecules reaches 212 degrees Fahrenheit, it melts, which softens it. This is why bread can actually feel soft and fluffy when it first comes out of the microwave. But then when it cools, that molecule recrystallizes and hardens, causing the bread to become chewy and hard.

Why does microwave make food chewy? ›

It all boils down to the natural sugars found in flour. Flour, milled from wheat, contains gluten (a type of protein) and sugars (which form starch when their molecules are chained together). When these sugars are heated, they melt and then quickly recrystallize, resulting in an undesirable chewy texture.

Why did my toffee turn out chewy? ›

Low and slow. Simmering the syrup for English toffee to the requisite 300°F temperature can (and should) be a slow process — up to 20 minutes or so. Don't hurry this gradual transformation; syrup that doesn't reach 300°F, or close to it, will make candy with timid flavor and chewy (not crunchy) texture.

Why are my roasted peanuts chewy? ›

Roast at 300 degrees for 35-45 minutes. The peanuts will be slightly underdone (a little chewy) when you remove them from the oven, but they will continue to cook once you remove them. Allow to cool for 5 minutes.

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