Muffin
1 ¾ all-purpose flour, spooned in
and leveled
½ teaspoon baking powder
½ teaspoon salt
¼ teaspoon baking soda
2/3 cup (1 1/3 sticks) unsalted
butter, slightly firm
2 teaspoons finely grated lemon
zest
¾ sugar
1 large egg
1 teaspoon pure vanilla extract
½ cup buttermilk
1 ½ cup fresh blueberries
Crumb topping
6 to 7 tablespoons unsalted
buttermilk
1 cup all-purpose flour, spooned
in and leveled
½ cup sugar
½ teaspoon ground cinnamon
¼ teaspoon baking powder
¼ teaspoon salt
Directions
For the crumb topping; place the butter
in a 2 quart heavy-bottomed saucepan and heat until melted; remove
from the heat and cool to tepid.
Whisk together the flour, sugar,
cinnamon, baking powder,and salt. Add to the butter and stir with a
fork until blended and mixture begins to form crumbs. Gently squeeze
the mixture with your hand to form larger lumps, then break them
apart with tour finger tips. Before using let the crumb topping stand
for 10 to 15 minutes.
Meanwhile for the muffins. Position the
rack in the upper and lower thirds of the oven. Heat the oven to
375°. Line fourteen muffin cups
with paper or foil cupcake liners.
In
a large bowl, thoroughly whisk together the flour, baking powder,
salts and baking soda. Set aside. Cut butter into 1-inch pieces and
place in the bowl of an electric mixer fitted with the paddle
attachment. Add the lemon zest and mix on medium speed until smooth
and lightened in color, about 1 minute. Add the sugar in a steady
stream, then blend in the egg and vanilla, scraping down the side of
the bowl as needed.
Reduce
the mixer speed to low and add the flour mixture alternating with the
buttermilk, dividing the flour into three parts and the buttermilk
into two. Mix just until blended after each addition.
Portion
half scoops of batter into the prepared pan using a no. 16 ice cream
scoop ( ¼ cup capacity). Place a layer of blueberries evenly over
the batter, then place a dollop of batter on top of the blueberries.
It's okay for the berries to show. Take a handful of the crumb
topping and crumble it over the batter and berries, completely
covering the tops of the muffin with crumbs. Press gently to adhere.
Brush any stray crumbs from the top of the muffin pans.
Bake
for 25 to 30 minutes, or until the crumb topping is golden brown. To
ensure even baking, rotate the pans top to bottom and front to bake,
half way through. Remove from oven and place on a rack to cool.