Prep the pan and oven. Heat your oven to 375°F (190°C). Line a 12-cup muffin tin with paper liners or grease lightly.
Mix dry ingredients. In a large bowl, whisk flour, baking powder, baking soda, and salt until well combined. This helps distribute the leaveners evenly.
Whisk the wet ingredients. In a separate bowl or large measuring cup, whisk yogurt, milk, maple syrup, oil, eggs, vanilla, and lemon zest until smooth.
Combine gently. Pour the wet mixture into the dry.
Stir with a spatula just until the flour disappears. The batter should be thick but scoopable. Do not overmix.
Fold in raspberries. Add raspberries and fold 4–5 times to distribute. If using frozen, work quickly to avoid streaking.
Portion the batter. Divide evenly among the muffin cups, filling each about 3/4 full.
Sprinkle with turbinado sugar if using.
Bake. Bake for 18–22 minutes, or until the tops are set and a toothpick comes out with a few moist crumbs. Start checking at 18 minutes.
Cool. Let muffins cool in the pan for 5 minutes, then transfer to a rack. Cooling helps set the crumb and prevents sogginess.
Serve. Enjoy warm or at room temperature.
They’re great plain or with a small smear of almond butter.