Using a hand mixer or a stand mixer fitted with the paddle attachment, cream the butter with both sugars. Add the applesauce and vanilla and beat to incorporate. Add in the dry ingredients and mix on low speed until combined. Fold in the caramel chips, if using.
½ cup (113g) unsalted butter, 1 cup (200g) brown sugar, ⅓ cup (67g) granulated sugar, ½ cup (128g) unsweetened applesauce, ½ teaspoon vanilla extract, ⅓ cup (57g) caramel chips
Spread batter into the prepared pan and bake for 25-30 minutes. Allow to cool completely before cutting into bars.
Notes
For dairy free blondies, substitute your favorite non-dairy butter.
I use sea salt caramel baking chips that I get at Trader Joe's during the fall season. The caramel chips can be left out if you have trouble finding them or would prefer to make without.