These oven baked peppermint puff blondie bars are the kind of easy dessert I love pulling together on a busy weeknight or right before a holiday gathering, because they rely on just a handful of pantry staples and still come out looking festive and special. The whole peppermint puffs soften and melt into the batter as the bars bake, creating sweet minty pockets throughout a buttery blondie base that tastes like you spent far more time on it than you actually did.
Serve these bars slightly warm or fully cooled with a glass of milk, hot coffee, or peppermint tea for a simple dessert plate. They also fit right in on a holiday cookie tray alongside chocolate treats, sugar cookies, or brownies, and if you want to dress them up a little, a scoop of vanilla ice cream or a light dusting of powdered sugar makes them feel extra celebratory.
Oven Baked 5-Ingredient Peppermint Puff Blondie Bars
Servings: 16 bars
Ingredients
1 box yellow cake mix
Directions
1. Preheat the oven to 350°F and lightly grease a clear glass 9x13 baking dish.
2. In a large mixing bowl, stir together the yellow cake mix, eggs, melted butter, and vanilla extract until a thick blondie-style batter forms.
3. Spread the batter evenly into the prepared baking dish, then press the whole unwrapped peppermint puffs across the top in an even layer, nestling them slightly into the batter.
4. Bake for 22 to 28 minutes, or until the edges are lightly golden and the center is set. The peppermint puffs will soften and melt into the top as the bars bake.
5. Let the bars cool in the pan for at least 20 minutes before slicing into squares and serving.
Variations & Tips
Make them extra minty: Add 1/4 teaspoon peppermint extract to the batter if you want a stronger candy cane flavor. A little goes a long way, so keep it light or it can overpower the buttery blondie base.
Try a holiday finish: Once the bars are cool, drizzle the top with a little melted white chocolate for a simple bakery-style look. This is especially nice if you're bringing them to a cookie exchange or packing them into gift boxes.
Use parchment for easy lifting: If you want especially neat slices, line the glass dish with parchment paper before adding the batter. After cooling, you can lift the whole slab out and cut it more cleanly on a board.
Do not overbake: Pull the pan when the center is just set, because these bars continue to firm up as they cool. Overbaking can make them more cakey and dry instead of soft and chewy.
Storage tip: Store the bars in an airtight container at room temperature for up to 3 days. If you're making them ahead during a busy week, they also keep well in the fridge and can be brought back to room temperature before serving.
