Raspberry Muffin with Brown Sugar Hazelnut Streusel

Steven’s parents have a raspberry bush in their yard and I was the lucky recipient of some of the delicious berries. I ended up eating most of them but I managed to set aside some (it wasn't easy) to bake with. The muffin base is adapted from the Cook’s Illustrated recipe for blueberry muffins but I replaced the blueberries with raspberries and topped them with a brown sugar hazelnut streusel. The muffin base recipe was absolutely delicious; it'll be my master muffin recipe from now on.

Notes:
- You can use blueberries and omit the topping for the original blueberry muffins
- I cut the sugar down from the 1 cup called for in the original recipe to 1/2 cup with 2 tablespoons of brown sugar on top for the streusel. I found this was the perfect amount of sweetness since Bettina and I don’t like our muffins too sweet.

Raspberry Muffins with Brown Sugar Hazelnut Streusel
Sour Cream Base Recipe adapted from Cook’s Illustrated
2 C flour
1 Tbsp baking powder
1/4 tsp salt
1 egg
1/2 C sugar
1/2 tsp vanilla
2 Tbsp melted butter
1 1/4 C sour cream

For Raspberry and Hazelnut Streusel
1 1/4 C raspberries
2 Tbsp finely chopped hazelnuts
2 Tbsp brown sugar
1 Tbsp melted butter
1 Tbsp flour

Preheat the oven to 350ºF, adjust a rack to the middle position. Spray a 12 cup regular size muffin tin with some nonstick spray.

Whisk flour, salt, and baking powder in a large mixing bowl and set aside. Whisk egg, sugar, and vanilla together until combined, then whisk in the sour cream and melted butter.

Scatter half the berries in the flour mix and scatter the rest in the sour cream mixture. Add the sour cream mixture to the flour and fold to combine, take care not to smush the raspberries too much. There should be not large pockets of flour but small streaks may remain. Do not over mix. The batter will be very thick.

Divide the batter evenly into the tin (a very large cookie scoop is excellent for this). Mix all of the ingredients for the streusel together and top each muffin with a small spoonful, then spread the filling out over the top of the muffin.

Bake for about 20 – 25 minutes or until a toothpick inserted in the center comes out clean. Gently pick the muffins out of the tin and cool them on a rack, flipping them out may cause the topping to fall off.