If you’re craving a crunchy, sweet, and utterly irresistible snack, look no further than this Addicting Toffee Chex Mix (Crispy Caramel Brittle) Recipe. It’s a delightful blend of crispy Chex cereal tossed with crunchy nuts and enveloped in a luscious, golden toffee coating that hardens into perfect brittle shards. This treat is a total crowd-pleaser at parties, a cozy companion for movie nights, or a homemade gift that will have everyone coming back for more. Trust me, once you try this recipe, you’ll see why it’s called addicting!

Ingredients You’ll Need
Simple ingredients make this toffee Chex mix shine, giving it a wonderful balance of flavors and textures. Each component plays an essential role, from the crunchy cereal base to the rich buttery toffee that brings everything together with a caramel kiss.
- 8–9 cups Chex cereal (Rice Chex or mix of Rice & Corn): The crunchy heart of this recipe, providing lightness and the perfect crunch to absorb the toffee.
- 1 1/2 cups nuts (pecan halves or walnuts): Adds a toasty, nutty contrast that complements the sweet toffee beautifully.
- 1 cup unsalted butter (226 g / 2 sticks): The rich, creamy base of the caramel coating; be sure to use unsalted for controlled seasoning.
- 1 1/2 cups packed brown sugar (light or dark): Gives deep, molasses-like sweetness that’s essential for that iconic toffee flavor.
- 1/2 cup light corn syrup: Keeps the toffee smooth and glossy, preventing crystallization for a beautiful finish.
- 1 tsp vanilla extract: Adds warmth and enhances the caramel notes in the brittle.
- 1 tsp baking soda: The magic that makes the toffee light and crispy by creating tiny air bubbles.
- 1/2 tsp fine salt: Balances the sweetness and brings out all the rich flavors.
How to Make Addicting Toffee Chex Mix (Crispy Caramel Brittle) Recipe
Step 1: Prepare Your Ingredients and Oven
Start by preheating your oven to 250°F (120°C) and lining a large rimmed baking sheet or two with parchment paper. Mixing the 8 to 9 cups of Chex cereal with 1 1/2 cups of nuts in a very large heatproof bowl is your base. Warming this bowl slightly under hot water and drying it before adding the cereal and nuts prevents the toffee from seizing up later, which is a smart little trick that makes a big difference.
Step 2: Make the Toffee Syrup
In a medium saucepan, melt together 1 cup of unsalted butter, 1 1/2 cups packed brown sugar, and 1/2 cup light corn syrup over medium-high heat. Stir until the mixture is smooth, then bring it to a rolling boil. Let it boil without stirring for 5 whole minutes to achieve the perfect caramelization. Use a saucepan with high sides because this syrup will bubble up once we add the baking soda next.
Step 3: Add Flavor and Baking Soda
Remove the pan from heat right after boiling, then quickly whisk in 1 teaspoon vanilla extract, 1/2 teaspoon fine salt, and 1 teaspoon baking soda. Watch closely as the mixture foams, lightens in color, and expands from the carbon dioxide bubbles—that’s the secret to the brittle’s crisp texture. Just be very careful during this step because the syrup is extremely hot and can cause burns.
Step 4: Coat the Cereal and Nuts
Pour the foaming toffee syrup over the Chex cereal and nuts in your warmed bowl. Use a silicone spatula to fold and toss rapidly, making sure every bit of cereal and nut is glossy and fully coated. Don’t forget to scrape the bottom and rotate the bowl to avoid any dry clumps—consistency here is key for even flavor and crunch.
Step 5: Bake to Perfection
Spread the coated mixture evenly onto your prepared baking sheet(s). Bake in the preheated oven for 45 to 60 minutes. Every 15 minutes, take a moment to stir the mix gently to redistribute the syrup and ensure it crisps evenly throughout. You’ll know it’s done when the pieces feel dry and light, no longer sticky or tacky.
Step 6: Cool and Break into Shards
Once baked, let the toffee Chex mix cool completely right on the pan for about 30 to 45 minutes. As it cools, it will harden into those perfect brittle shards. Then, break it into bite-sized pieces and store in an airtight container to keep it fresh up to a week. For gifting, place the brittle in cellophane bags and sprinkle flaky sea salt on top—it’s a lovely touch that amps up the flavor beautifully.
How to Serve Addicting Toffee Chex Mix (Crispy Caramel Brittle) Recipe
Garnishes
A little sprinkle of flaky sea salt or a dusting of powdered sugar can elevate your toffee Chex mix to an elegant snack, balancing the sweetness with a hint of savory flair or a gentle snow-like finish, perfect for gifting or sharing at gatherings.
Side Dishes
This mix pairs wonderfully alongside a hot cup of coffee or a warm mug of cocoa. It’s also fantastic as a sweet and crunchy side for holiday dessert tables or as a crunchy contrast in parfaits with yogurt and berries.
Creative Ways to Present
Give your Addicting Toffee Chex Mix (Crispy Caramel Brittle) Recipe a festive twist by packaging it in decorative tins or clear jars tied with a ribbon. For parties, serve it in colorful bowls or mason jars, and add little scoops so everyone can snack easily while mingling.
Make Ahead and Storage
Storing Leftovers
Store any leftovers in an airtight container at room temperature to keep that perfect crunch. Properly sealed, the mix stays fresh and crispy for up to a week, making it ideal to prepare ahead of time for gatherings or just to satisfy future snack attacks.
Freezing
You can freeze the toffee Chex mix for longer storage by placing it in a freezer-safe bag or container. Thaw at room temperature before serving; the texture remains crisp and the flavor just as amazing.
Reheating
If your mix loses a bit of its crunch, a quick 5 to 10-minute bake at 250°F in the oven will revive that addicting crispness. Just keep an eye on it to avoid burning, and you’ll enjoy fresh-tasting brittle again.
FAQs
Can I use different nuts in this recipe?
Absolutely! While pecans and walnuts are traditional, feel free to try almonds, hazelnuts, or even peanuts. Just roast them lightly for the best flavor and crunch before mixing.
Is it necessary to warm the mixing bowl beforehand?
Warming the bowl helps prevent the toffee syrup from seizing when you toss it with the cereal and nuts. It’s a helpful step, but if you forget, don’t worry—the recipe will still turn out great; it just may require a bit more care when mixing.
Can I make this recipe gluten-free?
Yes! Just be sure to use gluten-free Chex cereal options. The rest of the ingredients are naturally gluten-free, so it’s a fantastic treat for those avoiding gluten.
Why does the baking soda need to be added at the end?
The baking soda reacts with the acidic sugar mixture, causing the syrup to foam and aerate, which creates the light, crispy brittle texture. Adding it at the end ensures this reaction happens properly.
What’s the best way to prevent sticky toffee mix?
Baking the coated mixture evenly in a low-temperature oven and stirring every 15 minutes is key. This allows excess moisture to evaporate so your toffee brittle crisps perfectly instead of sticking together.
Final Thoughts
This Addicting Toffee Chex Mix (Crispy Caramel Brittle) Recipe has quickly become one of my go-to snacks for its unbeatable combination of crunchy, nutty, and buttery-sweet goodness. It’s so easy to make and even easier to love! Whether you’re sharing with friends, gifting it this holiday season, or sneaking bites when no one’s looking, this snack delivers happiness in every bite. Give it a try—you’re going to fall in love just like I did!
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Addicting Toffee Chex Mix (Crispy Caramel Brittle) Recipe
- Prep Time: 10 minutes
- Cook Time: 1 hour
- Total Time: 1 hour 10 minutes
- Yield: About 10 cups
- Category: Snack
- Method: Baking
- Cuisine: American
Description
This Addicting Toffee Chex Mix recipe transforms classic Chex cereal and nuts into a crispy, caramel brittle treat coated in a luscious homemade toffee syrup. Perfect for snacking or gifting, this crunchy mix combines the rich flavors of brown sugar, butter, and vanilla with the satisfying texture of toasted nuts and cereal, baked to perfection at a low temperature for an irresistible crunch.
Ingredients
Dry Ingredients
- 8–9 cups Chex cereal (Rice Chex or a mix of Rice & Corn)
- 1 1/2 cups nuts (pecan halves or walnuts)
- 1 tsp baking soda
- 1/2 tsp fine salt
Wet Ingredients
- 1 cup unsalted butter (226 g / 2 sticks)
- 1 1/2 cups packed brown sugar (light or dark)
- 1/2 cup light corn syrup
- 1 tsp vanilla extract
Instructions
- Preheat and Prepare: Preheat your oven to 250°F (120°C). Line one or two large rimmed baking sheets with parchment paper. In a very large heatproof bowl, combine 8–9 cups of Chex cereal and 1 1/2 cups of nuts. Warm the bowl by running it under hot water and drying thoroughly to prevent the toffee mixture from seizing.
- Make Toffee Syrup: In a medium saucepan over medium-high heat, melt together 1 cup unsalted butter, 1 1/2 cups packed brown sugar, and 1/2 cup light corn syrup, stirring until smooth. Bring it to a rolling boil and let it boil without stirring for 5 minutes. Use a deep-sided saucepan to accommodate expansion when adding baking soda.
- Add Flavor and Leavening: Remove the saucepan from heat and immediately whisk in 1 teaspoon vanilla extract, 1/2 teaspoon fine salt, and 1 teaspoon baking soda. The mixture will foam and lighten in color, creating the airy brittle texture. Exercise caution to avoid burns from the hot sugar.
- Coat Cereal Mix: Pour the foaming toffee syrup over the cereal and nuts in the warm bowl. Using a silicone spatula, fold and toss quickly until all pieces are evenly coated with a glossy toffee layer. Scrape the sides and bottom to ensure no dry spots remain.
- Bake the Mix: Evenly spread the coated mixture onto the prepared baking sheet(s). Bake in the preheated oven for 45–60 minutes, stirring every 15 minutes to redistribute syrup and promote even crisping. The mix is ready when pieces feel dry, light, and no longer sticky.
- Cool and Store: Remove from oven and allow the Chex mix to cool completely on the pan for 30–45 minutes; it will harden as it cools. Break it into bite-sized pieces once cooled. Store in an airtight container at room temperature for up to 1 week, or package into cellophane bags for gifting, optionally sprinkling flaky sea salt on top.
Notes
- Warming the mixing bowl prevents the toffee syrup from seizing when poured over the cereal.
- Stirring every 15 minutes during baking promotes consistent coating and crisp texture.
- Use a deep saucepan to prevent overflow when adding baking soda to the hot syrup.
- Be cautious during the foaming stage to avoid burns from hot sugar and expanding syrup.
- Store in an airtight container to maintain crispness; humidity can cause the brittle to become sticky.
- Flaky sea salt adds a delightful contrast if sprinkled just before serving or packaging.

