In a medium mixing bowl, whisk together the flour, baking powder, salt, sugar, and lemon zest. Whisking is important here—it aerates the flour and distributes the baking powder evenly so you get consistent rise throughout all your pancakes. If you just stir, you'll end up with some that puff beautifully and others that stay dense. Whisk for about 15-20 seconds until everything looks combined and light.

In another bowl, crack your egg and whisk it lightly. Add the milk, melted butter, and vanilla extract. Whisk this mixture until it's completely combined, about 30 seconds. The egg should be fully incorporated—no strings of white should remain. This step ensures even distribution of fat from the butter, which creates those tender, moist pancakes. Pro tip: If your butter is too hot when you pour the milk in, it can actually start cooking the egg. That's why I always let melted butter cool for 2-3 minutes before mixing. You want it liquid and warm, but not actively steaming.

Pour the wet ingredients into the dry ingredients. Here's where many people make their first mistake: they overmix. Stir with a spatula or wooden spoon just until you see no more dry flour streaks. The batter should look lumpy. I mean actually lumpy. There should be visible pockets of flour throughout. This is exactly what you want. Why? Because overmixing develops gluten, which makes pancakes tough and rubbery instead of tender and fluffy. The leavening agent needs unmixed flour pockets to create steam and create those air pockets. Stop mixing after about 10-15 strokes.

Using a gentle folding motion (not stirring), fold the blueberries into the batter. If you're using frozen blueberries, add them directly without thawing. The cold berries won't sink as readily if you keep your batter thick and fold gently. Aim for 8-10 folds, just until the berries are distributed. Resist the urge to crush any berries you encounter. Whole berries create those gorgeous pockets of blueberry flavor throughout your pancakes, plus they preserve more of the nutritional anthocyanins.

Heat a nonstick skillet, griddle, or cast iron over medium heat. Let it preheat for about 2-3 minutes. To test if it's ready, flick a tiny drop of water onto the surface—it should sizzle and evaporate immediately, not sit there. This is crucial. Too-cool griddles produce dense pancakes. Too-hot griddles burn the outside before the inside cooks through. Once ready, scoop the batter using a ¼-cup measure or a small ice cream scoop. This keeps sizes consistent, which means everything cooks at the same rate. Pour onto the griddle and let sit without moving for 2-3 minutes. You'll see bubbles forming on the surface—this is the carbon dioxide from the baking powder creating those air pockets. When the bubbles break and leave little holes, and when the edges look set and slightly dry, it's time to flip.

Use a thin spatula and flip gently. The second side cooks faster—about 1-2 minutes until golden brown. The bottoms should have a light golden color, not dark brown. Dark means the outside is overcooked even if the inside is still perfect. Transfer cooked pancakes to a warm plate. If you're making multiple batches, keep finished pancakes warm in a 200°F oven while you finish the rest. Repeat until all batter is used.