01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or grease lightly with cooking spray.
02 - Place pistachios in a food processor and pulse until finely chopped, leaving some small pieces for texture. Reserve 2 tablespoons of chopped pistachios for garnish.
03 - In a large bowl, whisk together flour, granulated sugar, brown sugar, baking powder, baking soda, salt, and chopped pistachios until well blended.
04 - In a separate bowl, whisk eggs, milk, yogurt, melted butter, and vanilla extract until smooth and thoroughly combined.
05 - Pour wet ingredients into dry ingredients. Gently fold with a spatula just until combined—do not overmix or muffins will become dense.
06 - Divide batter evenly among prepared muffin cups, filling each about 3/4 full.
07 - Bake for 16–18 minutes until tops are golden and a toothpick inserted in the center comes out clean. Let muffins cool in the tin for 5 minutes, then transfer to a wire rack.
08 - In a small bowl, whisk powdered sugar, milk, and vanilla until smooth and pourable. Add more milk if glaze is too thick.
09 - Drizzle glaze generously over completely cooled muffins. Sprinkle with reserved chopped pistachios and let glaze set for 10 minutes before serving.