Combine softened butter and granulated sugar in a medium bowl, mixing until creamy.

Gradually add flour, stirring until a crumbly dough forms, then press into the bottom of a greased pan.

Preheat your oven to 350°F (175°C) and bake the crust for 15–20 minutes until lightly golden.

In a separate bowl, whisk together mango puree, lemon juice, lemon zest, and additional sugar.

Pour mango mixture over pre-baked crust and return to oven, baking for another 25–30 minutes.

Let the mango bars cool completely in the pan on a wire rack, then refrigerate for at least an hour.

Slice into squares or rectangles and dust with powdered sugar before serving.