Peanut Brittle Recipe Easy No Bake: Crunchy Sweetness in Minutes

This no-bake peanut brittle delivers crispy, buttery perfection without turning on your oven. I developed this method after years of struggling with traditional stovetop versions that always seemed to burn or seize up.

The secret lies in the microwave, which provides even heating and precise control over the sugar mixture. This approach eliminates the guesswork of candy thermometers while still producing that signature shatteringly crisp texture we all love.

You’ll end up with golden sheets of brittle packed with salty peanuts and a perfect sweet-salty balance. The process takes less than 15 minutes from start to finish, making it ideal for last-minute gifts or holiday treats.

Break it into pieces and watch it disappear. Here’s how to make this foolproof candy.

Ingredients for Peanut Brittle Recipe Easy No Bake

Seven simple ingredients transform into shatteringly crisp peanut brittle in minutes.

The peanuts are key—dry-roasted salted peanuts give that perfect crunch (the good stuff, not the honey-roasted kind). I grab mine from Whole Foods or bulk bins at natural food stores. The sugar needs to be plain white granulated—raw or turbinado won’t melt right. For the corn syrup, Karo light is my go-to, but any light variety works.

No corn syrup? Honey or agave at a 1:1 ratio works in a pinch (but texture differs slightly). Swap salted peanuts for unsalted and add extra 1/4 tsp salt. Want more depth? Brown sugar instead of white gives a caramel note. The vanilla can be skipped, but I wouldn’t—it rounds out the sweetness.

Store in an airtight container at room temp for up to 2 weeks. Humidity is the enemy, so add a silica packet if you’ve got one. Perfect for gifting—wrap in parchment, tie with ribbon, done.

Step-by-Step Instructions for Peanut Brittle

Here’s the method. Straightforward, tested, works every time.

Step 1: Combine Sugar and Corn Syrup

In a heavy-bottomed saucepan, combine the 1.5 cups Granulated Sugar and 1 cup Light Corn Syrup. I always use a light-colored pan so I can better judge the color as it caramelizes.

Cook over medium heat, stirring constantly with a wooden spoon until the sugar dissolves completely. You’ll see the mixture start to bubble gently—this is normal. Stop stirring once it begins to boil to prevent crystallization.

Step 2: Cook to Hard Crack Stage

Continue cooking without stirring until the mixture reaches 300°F on a candy thermometer. If you don’t have a thermometer, test by dropping a small amount into cold water—it should form hard, brittle threads that snap when cooled.

The color will deepen to a rich amber. This usually takes 10-15 minutes but watch closely as it can burn quickly. Remove from heat immediately when it hits temperature.

Step 3: Add Peanuts and Butter

Quickly stir in the 2 cups Salted Peanuts and 4 tbsp Unsalted Butter. The mixture will bubble vigorously—that’s the moisture in the butter reacting with the hot sugar. Stir just until the butter melts completely, about 30-45 seconds.

Return the pan to medium-low heat and cook for another 2-3 minutes, stirring occasionally, until the peanuts are fully coated and the mixture returns to 300°F. This ensures the peanuts are properly toasted within the candy.

Step 4: Finish with Vanilla and Baking Soda

Remove from heat again and quickly stir in the 1 tsp Vanilla Extract, 0.5 tsp Baking Soda, and 0.5 tsp Kosher Salt. The baking soda will cause the mixture to foam up dramatically—this creates the characteristic airy texture.

Stir just until combined, then immediately pour the mixture onto a greased baking sheet or silicone mat. Use a heatproof spatula to spread it into an even layer about ¼-inch thick.

Step 5: Cool and Break

Let the peanut brittle cool completely at room temperature, which takes about 30-45 minutes. You’ll know it’s ready when it’s hard to the touch and no longer warm.

Break into pieces by hand or with a rolling pin. For uniform pieces, score the brittle into squares with a knife while it’s still slightly warm but firm. Store in an airtight container at room temperature for up to 2 weeks.

Make-Ahead Tips for This Recipe

Prep Ahead

Measure all your ingredients before starting—this moves fast once the sugar heats. I keep 2 cups peanuts in a bowl, 4 tbsp cubed butter on a plate, and the vanilla, baking soda, and salt pre-measured in small cups. 💡

Silicone Mat Ready

Lay out your silicone mat or grease a baking sheet with butter or cooking spray ahead of time. The candy hardens within minutes, so having your surface ready prevents frantic scrambling. I use a 12×17-inch mat for even spreading.

Double Batch Tip

This recipe doubles beautifully for gifting. Use a 4-quart microwave-safe bowl and extend cooking time in 2-minute bursts. Just work quickly when adding peanuts and butter—the larger volume sets faster.

Holiday Planning

Make brittle up to 1 week ahead for parties. Store layers separated by parchment in airtight containers. I’ve shipped it cross-country in padded envelopes with silica packets to keep it crisp.

Break into gift-sized pieces the day before serving for freshest texture. 🎁

Re-Crisp Trick

If humidity softens your brittle, revive it by baking at 200°F for 10 minutes, then cooling completely. This works once per batch—after that, the sugar starts to degrade.

Frequently Asked Questions