¼cuprainbow sprinklesor 1 ½ cups frozen blueberries
Crumbs:
⅔cupsugar
¼cupflour
1tbspvanilla sugar
3tbspbutter or margarine,at room temperature
2tbspsprinkles(omit for blueberry muffins)
Instructions
Preheat oven to 350°F. Line a muffin pan with liners.
In a bowl, combine dry ingredients. In a separate bowl, whisk together oil, milk, eggs, and vanilla and mix to combine. Gently fold in sprinkles or blueberries.
Add batter to each muffin cup.
Meanwhile, knead crumb ingredients together in a bowl until crumbs form. Sprinkle on top of batter.
Bake for 15 minutes, then raise temperature to 400°F and bake an additional 5-7 minutes.
Notes
I used a more sugary streusel so the top gets crisp (finishing the baking at 400°F also helps achieve that).