01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or grease lightly.
02 - In a large mixing bowl, whisk together ricotta cheese, eggs, whole milk, vegetable oil, vanilla extract, lemon zest, and fresh lemon juice until mixture is smooth.
03 - In a separate bowl, whisk all-purpose flour, granulated sugar, baking powder, baking soda, and salt until evenly combined.
04 - Add dry mixture to the wet mixture and stir gently until just combined. Some lumps may remain.
05 - Fold diced mango into the batter with a spatula, mixing carefully to avoid overmixing.
06 - Distribute batter evenly into prepared muffin cups, filling each approximately three-quarters full.
07 - Bake for 20 to 22 minutes, or until a toothpick inserted into the center comes out clean and the tops are lightly golden.
08 - Let muffins cool in the pan for 5 minutes. Transfer to a wire rack and allow to cool completely.