Preheat oven to 400 degrees F.
In a large mixing bowl, cream butter and sugar together with an electric mixer. Add the mango puree, lemon zest, extracts and egg and mix well. In a medium mixing bowl, sift the flour, baking soda, and baking powder. Carefully fold in the dry ingredients and buttermilk into the wet mixture with a rubber spatula. Drop spoonfuls of the dough onto parchment-lined cookie sheet. Bake for 12 to 15 minutes or until golden brown. Transfer to a wire rack to cool. Sprinkle with powdered sugar.
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Recipe courtesy of Saptosa Foster, Atlanta, Georgia