01 -
Warm up your oven to 375°F and pop muffin liners into a baking tin.
02 -
Using a small bowl, mix cinnamon, flour, and sugar with a whisk. Pour in melted butter and stir with a fork till it's crumbly. Chill in the fridge.
03 -
Take a bigger bowl and whisk together sugar, salt, flour, lemon zest, and baking powder.
04 -
In another large mixing bowl, beat together the melted butter, buttermilk, and egg. It might look separated—don’t worry; that’s okay!
05 -
Carefully add the wet stuff to the dry and stir till it’s just combined. It’ll be thick and look a little uneven—don’t overdo it!
06 -
Gently fold in the blueberries. Don’t keep mixing; you want to avoid turning everything purple.
07 -
Grab a cookie scoop (around 3 tablespoons) and plop batter evenly into the 12 cups.
08 -
Take the chilled crumbly topping and sprinkle it by hand over each muffin.
09 -
Pop the tin in the oven for 28 to 30 minutes, till the muffin tops are golden and bounce back when pressed lightly.
10 -
They’re good warm, but they taste even better after about 2 hours of cooling.