Prep the basics: Preheat your oven to 350°F (175°C).
Line a 12-cup muffin tin with paper liners or lightly grease it. Rinse, dry, and dice the strawberries into small pieces.
Mix dry ingredients: In a large bowl, whisk 1 cup all-purpose flour, 1/2 cup vanilla protein powder, 1 1/2 teaspoons baking powder, 1/4 teaspoon baking soda, and 1/4 teaspoon salt. Break up any protein powder clumps.
Combine wet ingredients: In a separate bowl, whisk 2 eggs, 3/4 cup plain Greek yogurt, 1/3 cup maple syrup or honey, 1/4 cup milk, 2 tablespoons neutral oil, and 1 teaspoon vanilla extract until smooth.
Bring it together: Pour the wet mixture into the dry and fold gently with a spatula.
Don’t overmix. The batter should be thick but scoopable. If it seems too dry, add another tablespoon of milk.
Fold in strawberries: Toss the diced berries with 1 teaspoon flour to help prevent sinking, then fold them into the batter.
If using lemon zest or chia seeds (about 1 tablespoon), add them now.
Fill the tin: Divide the batter evenly among the muffin cups, filling each about 3/4 full. For a bakery-style top, sprinkle a little turbinado sugar.
Bake: Bake for 16–20 minutes, or until the tops are set and a toothpick comes out with just a few moist crumbs. Start checking at 16 minutes to avoid dryness.
Cool: Let muffins cool in the pan for 5 minutes, then transfer to a rack.
Cool completely before storing so they don’t steam and get soggy.
Enjoy: Serve warm as-is, or split and spread with a little almond butter for extra protein and healthy fats.