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Export 7 ingredients for grocery delivery
Step 1
Preheat oven to 350F (175C) and line a 13x9 pan with parchment paper**
Step 2
Combine melted butter and sugar in a large bowl and stir well.
Step 3
Add eggs, egg yolk, and vanilla extract and stir until completely combined. Set aside.
Step 4
In a separate bowl, whisk together flour, cornstarch, baking powder, and salt.
Step 5
Gradually stir dry ingredients into wet until completely combined.
Step 6
Fold in white chocolate chips and nuts, if using.
Step 7
Spread blondie batter into prepared pan and transfer to oven.
Step 8
Bake on 350F (175C) for 25-30 minutes*** or until a toothpick inserted in the center comes out clean or with a few fudgy crumbs.
Step 9
Allow to cool before cutting and enjoying