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Preheat oven to 350°F.
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Grease a 9 x 13 inch baking pan with butter and line with parchment. (If you don't have parchment, you can use cooking spray with good results as well).
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In large bowl, whisk together flour, baking soda, and baking powder, set aside.
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In mixing bowl, combine 2 cups of butter, brown sugar, ground coffee, and 1 teaspoon salt.
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Stir on low to combine.
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Stir in eggs, vanilla extract and Bailey's.
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Slowly add in flour mixture until just combined and moist.
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Pour batter into prepared baking dish.
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Spread prepared pecans over batter. (See recipe below)
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Bake 25-30 minutes until inserted tooth pick comes out clean.
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If you like a chewy blondie, reduce cooking time to 25 minutes. Cool completely before topping with frosting.
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As blondies cool make frosting.