Preheat oven to 350° F. Grease a lined 8x8 baking dish with parchment paper.
Pour melted butter and sugars in a medium bowl and whisk together.
Add eggs, lemon zest, lemon juice and extracts to bowl and whisk together.
Slowly add flour and fold into wet ingredients till fully incorporated.
Bake for 15-18 minutes. The edges will be slightly more cooked than the center. Do not over bake. Remove from oven and let cool for 30 minutes.
Make glaze by combining powder sugar, lemon juice, vanilla extract and lemon zest. Pour over cool blondies, let it set and enjoy.
