Preheat the oven to 425°F and line a muffin tray with liners or generously spray/butter the muffin cups.
In a small bowl, mix together the crumble ingredients and set aside.
6 tbsp all-purpose flour, 2 tbsp brown sugar, 2 tbsp melted butter, Pinch of salt
Toss the blueberries with 1 tbsp flour.
1 ½ cups fresh blueberries, 1 tbsp flour for blueberries
Mix dry ingredients in a bowl (remaining flour, baking powder, baking soda, salt).
1 ¾ cup all-purpose flour, 1 tsp baking powder, ½ tsp baking soda, ½ tsp salt
In a separate large bowl, whisk together butter and sugars.
½ cup granulated sugar (or cane sugar), ½ cup melted butter, ½ cup brown sugar
Add eggs, one at a time, whisking after each.
2 eggs
Whisk in yogurt, then the vanilla and lemon.
⅔ cup plain Greek yogurt, 2 tsp vanilla extract, 2 tbsp lemon juice
Whisk in dry ingredients until just combined (don’t overmix), then fold in the blueberries.
1 ½ cups fresh blueberries
Using an ice cream scoop or a spoon, scoop batter into each liner, filing to the top, then top each muffin with crumble.
Bake at 425°F for 5 minutes (this gives them a nice initial lift so they’ll be tall and fluffy), then reduce oven temp to 350°F while muffins are still in the oven. Bake another 15-18 minutes, or until a toothpick inserted into the center comes out with only a few crumbs.
Let the muffins rest for 5-10 minutes, then remove them from tin and let cool before eating.