Step 1: Preheat your oven to 350°F (175°C). Line a large baking sheet with parchment paper or a silicone baking mat. This step is crucial for easy cleanup and preventing sticking, especially with the sticky toffee.
Step 2: Spread the mini pretzels in a single layer over the prepared baking sheet. Try to get them as even as possible for uniform coating.
Step 3: In a medium saucepan, melt the unsalted butter over medium heat. Once melted, stir in the light brown sugar. Bring the mixture to a gentle boil, stirring constantly, and let it boil for 2-3 minutes. This process creates the rich, buttery toffee. Don’t stop stirring, or it might burn!
Step 4: Carefully pour the hot toffee mixture evenly over the pretzels on the baking sheet. Use a spatula to gently toss and coat all the pretzels. Work quickly, as the toffee will start to set as it cools.
Step 5: Bake for 8-10 minutes, then remove from the oven and stir the pretzels again to redistribute the toffee and ensure even baking. Return to the oven and bake for another 5-7 minutes, or until the toffee is deeply caramelized and bubbly. Keep a close eye on them; toffee can burn quickly.
Step 6: Once baked, remove the baking sheet from the oven and immediately spread the 3 Ingredient Butter Toffee Pretzels into a single layer. Let them cool completely on the baking sheet, undisturbed, for at least 30-60 minutes. As they cool, the toffee will harden and become brittle and crunchy.
Step 7: Once completely cool and hardened, break the 3 Ingredient Butter Toffee Pretzels apart into bite-sized pieces. Store them in an airtight container at room temperature for up to a week. Enjoy your delicious homemade snack!