Chewy butterscotch blondies with rich, caramelized brown sugar flavor are a warm, golden family dessert. These simple, one-bowl bars deliver comforting sweetness with minimal effort.
Preheat the oven to 350°F (175°C). Line an 8-inch square baking pan with parchment paper for easy removal.
Melt the unsalted butter in a medium microwave-safe bowl using 50% power in 30-second bursts. Stir to cool slightly.
Whisk the light brown sugar into the melted butter until smooth and glossy, ensuring no lumps remain.
Add the eggs one at a time, beating well after each addition. Mix in the vanilla extract.
Sift together the all-purpose flour, baking powder, and salt. Gently fold it into the wet mixture with a spatula until just combined to avoid overmixing.
Fold in the butterscotch chips, ensuring they are evenly distributed throughout the batter.
Spread the batter evenly in the prepared pan with an offset spatula, smoothing the top.
Bake for 23–27 minutes, or until the edges are golden and a toothpick inserted in the center comes out with just a few moist crumbs. Do not overbake for a chewy texture.
Cool completely in the pan on a wire rack before lifting out and cutting into squares.