Peanut Brittle Recipe | Made in the Microwave! (2024)

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!

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


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


  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! (2024)


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.

How do you microwave raw peanuts? ›

Microwave for 2 1/2 minutes; stir, microwave 2 1/2 minutes longer. Peanuts will be crisp when cool. CAUTION: Cooking time necessary may vary with ovens; remember, peanuts continue to cook as they cool.

What does baking soda do for peanut brittle? ›

Baking soda is also very important at this stage since it reacts to the heat, creating carbon dioxide that aerates the caramel, enabling it to snap when someone bites into it rather than requiring them to gnaw at it until it breaks or pulls apart.

Why did my peanut brittle turned out chewy? ›

Why did my peanut brittle turn out chewy? The likely cause is that the sugar mixture didn't reach the proper hard crack stage temperature. Ensuring it reaches 300˚F is key to getting that classic brittle texture.

Why is my peanut brittle not crunchy? ›

Take the temperature

With peanut brittle, there is a point in the process where you add baking soda to the bubbling mixture of prior ingredients. That mixture needs to be no more than 305 degrees Fahrenheit to result in a crunchy candy.

How do you make peanut brittle hard again? ›

- Preheat your oven to a low temperature, around 250°F (120°C). - Break the stale peanut brittle into smaller pieces. - Place the brittle pieces on a baking sheet in a single layer. - Heat the brittle in the oven for about 5 to 10 minutes, checking frequently to avoid overcooking.

How long do you microwave peanuts? ›

For a light roast, microwave on HIGH for 2-1/2 minutes; stir, microwave 2-1/2 minutes longer. For a darker roast, stir and microwave 1 minute longer, in 30 second increments. Season to taste. Peanuts will be crisp when cool.

Why do you have to soak peanuts before boiling them? ›

An alternative method for dried raw mature peanuts is to rehydrate them by soaking overnight in water, after which they can be cooked in the conventional manner. The resulting snack is a very soft peanut in the shell, invariably quite salty. The softened peanuts are easy to open.

Why do you soak raw peanuts? ›

Soaking enhances digestibility and nutritional benefits. When we soak peanuts, it helps in breaking down phytic acid and reduce enzyme inhibitors. Soaked peanuts can be consumed in a variety of ways. You can add them in your breakfast meal or even dinner.

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.

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.

How Long Will homemade peanut brittle keep? ›

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.

Why is my peanut brittle like taffy? ›

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.

Can peanuts be microwaved? ›

Stir peanuts, microwave 2 minutes. Stir peanuts, microwave 30 seconds. Check to see if peanuts roasted (golden brown), if peanuts pale in color, continue in 30 second increments until roasted. Cool on baking sheet until completely cool, about 20 minutes - the peanuts will become crunchy as it cools.

What's the difference between toffee and peanut brittle? ›

Brittles are typically composed mostly of sugar, while toffees contain a fair amount of butter and in some cases milk. This makes toffees fuller and richer in taste, while brittles are more purely sweet and sugary. Brittles are also much thinner than most toffees.

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.

Why are my peanuts not getting soft? ›

Dried peanuts may require boiling up to 24 hours until they soften. If your water is hard, full of minerals, or you are boiling at high altitude, then your boiling times for dried peanuts may be greater than 24 hours.

How long does it take for brittle to harden? ›

Don't try to spread the candy once it's on the baking sheet as it starts hardening almost immediately and spreading it doesn't work well. Let the peanut brittle cool for 30 minutes, then break it into pieces. Store it in an airtight container at room temperature for up to two months.

Is peanut brittle supposed to be hard? ›

Peanut Brittle is a smooth, flat candy (similar to toffee), with peanuts in it, that is cooked on the stovetop and poured onto a sheet pan to cool. Once it cools it's broken into small individual-size pieces of hard candy and lasts at room temperature for several weeks.


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