The two-stage bake here does the real work. Starting at 425°F gives the batter a hard, fast rise before the structure sets, which is what creates that tall, cracked muffin-shop top. Drop it too early or skip the high heat altogether and you'll get muffins that spread instead of dome. On folding: stop at ten to twelve strokes, even if it looks slightly under-mixed. Gluten develops fast in a wet batter like this, and a few extra folds turn a tender crumb into something closer to bread. If your oven runs hot or has a strong hot spot (mine does, back left corner), rotate the tray halfway through the 350°F stage rather than opening the door during the first five minutes.

Once fully cooled, store muffins in an airtight container at room temperature for up to two days, a paper towel underneath helps absorb extra moisture and keeps the sugar top from going soft. For longer storage, wrap each muffin individually and freeze for up to three months. To revive one from frozen, unwrap it and warm in a 300°F oven for 10–12 minutes, or microwave 20 seconds if you're not fussy about the crust. Skip storing them in the fridge, it dries the crumb out faster than either the counter or the freezer.

Swap in raspberries or diced strawberries for the blueberries if that's what's ripe. A handful of poppy seeds folded in alongside the zest gives you a lemon poppy seed version with almost no extra work. For a gluten-free version, a 1:1 gluten-free flour blend works, though the crumb turns slightly denser and you'll want to add an extra minute or two at the 350°F stage. Serve warm with salted butter, or split and spread with lemon curd if you want to lean further into the citrus. They're also good alongside a soft-scrambled egg breakfast, the tartness cuts through the richness well.