Strawberry Muffins in 35 Minutes

Instructions:

1. In a medium bowl, whisk together 1/2 cup flour, 1/3 cup brown sugar, and cinnamon for the streusel.
2. Add the cold, cubed butter to the streusel mixture; use a fork or fingertips to rub the butter into the dry ingredients until coarse sand with pea-sized clumps forms.
3. Place the streusel in the refrigerator to keep the butter cold.
4. Preheat oven to 375°F (190°C) and line a 12-cup muffin tin with paper liners.
5. Toss diced strawberries with 1 tbsp of flour until evenly coated.
6. In a large bowl, whisk together 2 cups flour, granulated sugar, 1/4 cup brown sugar, baking powder, and salt.
7. In a separate bowl, lightly beat the milk, oil, egg, and vanilla extract.
8. Pour the wet ingredients into the dry ingredients and stir with a spatula until just combined, leaving the batter slightly lumpy.
9. Gently fold in the floured strawberries using a folding motion.
10. Spoon the batter evenly into the 12 liners, filling them nearly to the top.
11. Generously sprinkle the chilled streusel over each muffin, pressing lightly.
12. Bake for 20 minutes or until a toothpick inserted into the center comes out clean.