Step 1: Preheat your oven to 375°F (190°C). This ensures your doughnuts bake evenly and achieve a nice golden color.
Step 2: In a large mixing bowl, whisk together the eggs, whole milk ricotta cheese, vanilla extract, and melted butter until smooth and well combined.
Step 3: In another bowl, whisk together the all-purpose flour, baking powder, granulated sugar, salt, and Meyer lemon zest.
Step 4: Gradually add the dry mixture into the wet ingredients, stirring gently until just combined.
Step 5: Lightly flour your work surface and turn the dough out. Pat it to about 1-inch thick, then use a doughnut cutter to cut out your doughnuts.
Step 6: Bake the doughnuts in the preheated oven for about 10-12 minutes or until they are lightly golden.
Step 7: While the doughnuts are baking, prepare the glaze. In a small bowl, combine the powdered sugar, Meyer lemon juice, mascarpone cheese, and vanilla extract. Whisk until smooth and creamy.
Step 8: Once the doughnuts have cooled slightly, dip the tops into the glaze, allowing the excess to drip off.
Step 9: These Easy Lemon Ricotta Old Fashioned Doughnuts are best enjoyed fresh. Serve them warm or at room temperature.