In a large mixing bowl, whisk together the flour, oats, both sugars, salt and baking powder together well. Cut or rub in the butter until large crumbs form.
Add the fresh mango flesh, sugar, lemon juice, and cornstarch to a blender or mash until smooth.
Pour the mango filling over the pressed crust, then sprinkle the remaining crumble on top. Bake until the top is golden brown and the filling is bubbling.
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✓ Old Fashioned Oats Brown sugar White sugar Salt Baking Powder Butter Ripe mangoes Lemon juice Cornstarch
EASY VEGAN CARROT CAKE VEGAN VICTORIA SPONGE CAKE