1-First Step: Prep the pan and oven Start by preheating your oven to 350°F. Line an 8-by-8-inch pan with aluminum foil and spray it with cooking spray. This simple step makes it much easier to lift the blondies out later and cut clean squares without sticking. Because these bars are meant to stay soft and gooey, the pan size matters. An 8-by-8-inch pan gives you thicker blondies with a chewy center, which is exactly what you want for this recipe.

2-Second Step: Melt the butter and mix the wet ingredients Place 1/2 cup unsalted butter in a microwave-safe bowl and melt it. Let it cool slightly so it does not scramble the egg when you mix. Add 1 large egg, 1 cup packed light brown sugar, and 1 tablespoon vanilla extract. Whisk until the mixture looks smooth and glossy. This is the moment where the batter starts to smell amazing. The butter and brown sugar create that warm caramel scent that makes this dessert feel extra cozy.

3-Third Step: Add the flour with a light hand Stir in 1 cup all-purpose flour until just combined. Try not to overmix. Once the flour disappears into the batter, stop stirring. Overmixing can make blondies tough instead of soft and tender. For the best texture, mix only until you no longer see dry flour. That small habit makes a big difference in the final bite.

4-Fourth Step: Fold in the pretzels Gently fold in 2 cups mini pretzels that have been loosely measured and slightly crushed. The goal is not to turn them into crumbs. You want a rustic mix of small pieces and bigger bits so every square gets a nice salty crunch. If you crush them by hand, the pieces stay uneven, which gives the blondies a better texture than using a food processor. That little mix of sizes makes the bars look and taste homemade in the best way.

5-Fifth Step: Spread, drizzle, and bake Spread the batter evenly into the prepared pan. Then drizzle about 1/3 cup salted caramel sauce over the top in a zigzag pattern. This layer bakes right into the blondies and gives them a gooey caramel ribbon throughout. Bake for 28 to 32 minutes, until the center is just set. The edges should look golden, but the middle should still have a soft, slightly underdone look when you take it out. That is what keeps the bars chewy after cooling. During baking, the caramel will bubble. That is normal and actually adds to the finished look. Just keep an eye on the top so the caramel does not brown too much.

6-Final Step: Finish with more caramel and let them cool As soon as the blondies come out of the oven, drizzle about 1/4 cup more salted caramel sauce on top in the same zigzag pattern. If you like, sprinkle coarse sea salt or Kosher salt over the top. Now comes the hardest part: waiting. Let the blondies cool completely for at least 1 hour before cutting. This lets the caramel soak in and keeps the bars from turning into a sticky mess. A sharp knife works best for clean squares once they are fully cool.