Craving something crunchy, buttery, and sweet that comes together in almost no time? This Microwave Peanut Brittle is the ultimate no-fuss recipe. Made entirely in the microwave with just a handful of ingredients, it delivers that old-fashioned candy-shop flavor — without the stovetop stress.
If you’re a fan of homemade treats or want to satisfy your sweet tooth without spending hours in the kitchen, this one’s for you. This peanut brittle recipe is reliable, beginner-friendly, and absolutely addictive.
Table of Contents
Why You’ll Love This Microwave Peanut Brittle Recipe
- Made in under 10 minutes with no candy thermometer needed
- Perfectly crunchy and buttery, just like classic brittle
- Uses simple ingredients you already have at home
- Microwave-only method makes cleanup a breeze
- Ideal for gifting during the holidays or anytime you need a quick sweet fix
Whether you’re new to candy-making or a brittle pro, this is one of the easiest brittle recipes you’ll ever try.
Who This Recipe Is Perfect For
This recipe is ideal for:
- Busy home cooks who want fast results
- Beginners looking for easy candy success
- Gift-givers preparing holiday tins or edible party favors
- Anyone with a sweet tooth craving a crunchy treat
- Fans of homemade peanut brittle who want a shortcut version
And if you’re putting together a dessert board, pair it with our No-Bake Nutella Cookies or Cornflake Cookies for a crowd-pleasing combo.
Ingredients You’ll Need
This recipe makes about 16 pieces:
- 1 cup granulated sugar (200g)
- ½ cup light corn syrup (120ml)
- 1 cup dry roasted peanuts (140g)
- ¼ teaspoon salt
- 1 tablespoon butter (14g)
- 1 teaspoon vanilla extract
- 1 teaspoon baking soda
Ingredient Notes and Easy Variations
- Sugar – Use white granulated sugar for classic flavor.
- Corn Syrup – Light corn syrup keeps the texture smooth and golden.
- Peanuts – Dry roasted, unsalted peanuts work best; if using salted, reduce added salt.
- Butter – Adds richness and helps smooth out the brittle texture.
- Vanilla Extract – Rounds out the flavor and adds warmth.
- Baking Soda – The secret to that bubbly, airy crunch.
- Add a twist – Try cashews, pecans, or a dash of cinnamon for a unique take.
Looking for something savory to serve beforehand? Try Greek Chicken Meatballs with Zesty Lemon Orzo for a light dinner before indulging in sweet treats.
Kitchen Equipment You’ll Need
- Microwave-safe glass bowl
- Silicone spatula or wooden spoon
- Measuring cups and spoons
- Baking sheet or flat tray
- Parchment paper or silicone mat
- Oven mitts (mixture gets very hot)
Step-by-Step Preparation: How to Make Microwave Peanut Brittle
Step 1: Mix Sugar and Syrup
In a microwave-safe glass bowl, stir together the sugar and corn syrup until well blended.
Step 2: Microwave Round One
Microwave on high for 4 minutes. The mixture should start to bubble.
Step 3: Add Peanuts and Salt
Carefully stir in the peanuts and salt. Return to the microwave and heat for another 2–3 minutes.
Step 4: Add Butter and Vanilla
Remove the bowl from the microwave (use oven mitts) and stir in the butter and vanilla extract. Be cautious — the mixture is extremely hot.
Step 5: Final Heat and Soda
Microwave one final time for 1 minute. Remove and immediately stir in the baking soda. The mixture will foam up — this is what gives brittle its airy texture.
Step 6: Spread and Cool
Quickly pour the mixture onto a parchment-lined baking sheet. Spread thin using a spatula. Let cool for 30–45 minutes or until fully set.
Step 7: Break Into Pieces
Once hardened, break the brittle into small shards or chunks using your hands.
Pro Tips for the Best Microwave Peanut Brittle
- Use a large microwave-safe bowl — the mixture will bubble up
- Work quickly after adding baking soda — the foam sets fast
- Don’t overheat – Watch closely, as microwaves vary in power
- Grease your spatula to help spread the hot mixture more easily
- Add a sprinkle of sea salt on top before it sets for a sweet-salty finish
Want to pair this treat with something creamy? A side of Creamy Garlic Chicken makes a rich, satisfying dinner to balance out dessert.
Common Mistakes to Avoid
- Using the wrong bowl – Always use heat-resistant glass to avoid cracking or melting
- Skipping the baking soda – It creates the airy texture that makes brittle so light
- Undercooking – If the sugar isn’t hot enough, the brittle won’t harden properly
- Overcooking – It can burn quickly in the microwave — stick to the timing
- Pouring slowly – Move fast after microwaving or it will set in the bowl
Serving Suggestions for Microwave Peanut Brittle
This sweet treat is perfect for:
- Gift baskets and holiday tins
- After-dinner snacks
- Office parties or cookie swaps
- Movie night munchies
- Add-ons to dessert boards
Want to make it part of a larger dessert spread? Pair with Easy Pineapple Upside Down Dump Cake and No-Bake Nutella Cookies for a no-bake dessert trio.
Creative Presentation Ideas
- Break into uniform squares and wrap in clear cellophane for gifting
- Layer in a mason jar with a ribbon for a rustic gift
- Stack in a cookie tin with parchment layers between pieces
- Serve in a candy bowl alongside Cornflake Cookies for a nostalgic vibe
- Add labels or gift tags with a personal note for holidays
Flavor Variations and Add-Ins
This microwave peanut brittle is easy to personalize:
- Add a pinch of cayenne for a spicy kick
- Mix in chopped pretzels for a sweet-and-salty combo
- Swap peanuts for almonds, cashews, or pecans
- Drizzle with melted chocolate after cooling for an indulgent twist
- Add pumpkin spice or cinnamon for a seasonal spin
How to Store and Reheat Microwave Peanut Brittle
Room Temperature: Store in an airtight container for up to 2 weeks.
Avoid Humidity: Moisture softens brittle — keep in a dry, cool spot.
Freezer: Not recommended — freezing can affect texture.
Reheat: Brittle isn’t usually reheated, but you can refresh slightly soft pieces in a low oven for a few minutes.
Make-Ahead Tips
- Make and store in advance – Great for prepping holiday gifts
- Break into small bags and freeze for up to 1 month (if well sealed)
- Prepare ingredients ahead so everything’s ready when the sugar starts bubbling
You’ll be ready to make batch after batch of this homemade peanut brittle without breaking a sweat.
Frequently Asked Questions
Is a candy thermometer needed?
Nope! This microwave method takes all the guesswork out.
Can I double the recipe?
It’s not recommended. Larger batches may not cook evenly in the microwave.
Why didn’t my brittle harden?
The sugar may not have cooked long enough, or the baking soda wasn’t stirred in quickly.
Can I use honey instead of corn syrup?
It can work but may change the texture and flavor.
Is this recipe gluten-free?
Yes! Just check that all your ingredients (like vanilla) are certified gluten-free.
Final Thoughts: Why Microwave Peanut Brittle Is a Sweet Treat Favorite
This microwave peanut brittle brings together everything we love about homemade treats — it’s fast, easy, and tastes like it took hours. The crisp, nutty crunch is pure nostalgia, and the fact that it’s microwave-friendly means you can make it anytime.
So whether you’re prepping sweet treats for gifting or simply feeding your own sweet tooth, this recipe is one that never fails to impress.
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Irresistible Microwave Peanut Brittle You Can Make in Minutes
- Total Time: 10 minutes
- Yield: 16 pieces 1x
Description
This easy Microwave Peanut Brittle gives you all the buttery, crunchy, old-fashioned candy-shop flavor in a fraction of the time. Made entirely in the microwave with simple pantry ingredients, it skips the candy thermometer and stovetop fuss, making it perfect for beginners, holiday gifting, party favors, or a quick sweet treat anytime the craving hits.
Ingredients
- Microwave Peanut Brittle Ingredients
- 1 cup granulated sugar (200g)
- ½ cup light corn syrup (120 ml)
- 1 cup dry roasted peanuts (140 g)
- ¼ teaspoon salt
- 1 tablespoon butter (14 g)
- 1 teaspoon vanilla extract
- 1 teaspoon baking soda
- Ingredient Notes & Variations
- Use white granulated sugar for classic flavor and texture.
- Light corn syrup helps keep the mixture smooth and golden.
- Dry roasted unsalted peanuts work best; reduce added salt if using salted peanuts.
- Baking soda is essential for the bubbly, airy crunch in the finished brittle.
- Try swapping in cashews, almonds, or pecans, or add a pinch of cinnamon or cayenne for a fun twist.
Instructions
- Mix Sugar and Syrup: In a large microwave-safe glass bowl, stir together the granulated sugar and light corn syrup until well combined.
- First Microwave: Microwave on high for about 4 minutes, or until the mixture begins to bubble. Handle carefully, as it will be very hot.
- Add Peanuts and Salt: Stir in the dry roasted peanuts and salt, mixing to coat the nuts evenly in the hot syrup.
- Second Microwave: Return the bowl to the microwave and cook for another 2–3 minutes, until the mixture is bubbling and slightly deepened in color.
- Add Butter and Vanilla: Using oven mitts, remove the bowl from the microwave and quickly stir in the butter and vanilla extract until smooth.
- Final Heat and Baking Soda: Microwave one last time for about 1 minute. Carefully remove the bowl and immediately stir in the baking soda. The mixture will foam up and lighten in color.
- Spread the Brittle: Quickly pour the foamy mixture onto a parchment-lined baking sheet or silicone mat. Use a greased spatula to spread it into a thin, even layer.
- Cool and Break: Let the brittle cool at room temperature for 30–45 minutes, or until completely hardened. Break into shards or small pieces and serve.
Notes
- Use a large, heatproof glass bowl so the hot mixture has room to bubble without overflowing.
- Work quickly once the baking soda is added; the airy, foamy texture sets fast.
- Microwave times may vary depending on your microwave wattage, so watch closely to prevent burning.
- Grease your spatula lightly to help spread the hot brittle mixture more easily.
- Add a light sprinkle of flaky sea salt on top before it sets for a sweet-salty finish.
- Store brittle in an airtight container in a cool, dry place to keep it crisp; humidity can soften the candy.
- For gifting, break into even pieces and package in tins, jars, or clear bags with parchment between layers.
- Prep Time: 5 minutes
- Cook Time: 5 minutes
- Category: Dessert, Candy
- Method: Microwave, No-Bake
- Cuisine: American
