8 oz. (1 cup) unsalted butter, softened; more for the pan
13½ oz. (3 cups) all-purpose flour
1½ cups old-fashioned rolled oats (not quick oats)
1 13 cups packed light brown sugar
1 tsp. table salt
1 tsp. baking powder
1 large egg, separated
1 14-oz. can sweetened condensed milk
½ cup fresh lemon juice
2 tsp. grated lemon zest
2½ cups room-temperature blueberries (about 13 oz.),
washed and drained on paper towels
Position a rack in the center of the oven and heat the
oven to 350°F. Line a 9x13-inch metal baking pan with foil,
leaving a 1-inch overhang on the ends. Lightly butter the
bottom and sides of the foil.
In a large bowl, combine the flour, oats, sugar, salt,
and baking powder. Using your fingers, blend the butter
completely into the flour mixture. Transfer 2 cups of
crumb mixture to another bowl and reserve for the
topping. Blend the egg white into the remaining crumbs
and then press the mixture into the bottom of the pan to
form a level crust. You can tamp it with the bottom of a
measuring cup to even it out. Bake the crust until it starts
to form a dry top, 10 to 12 minutes.
Meanwhile, in a medium bowl, whisk the condensed
milk, lemon juice, lemon zest, and egg yolk. Let this
mixture stand for 5 minutes; it will begin to thicken.
Sprinkle the blueberries evenly over the hot crust
and then drop spoonfuls of the lemon mixture over the
blueberries. Spread gently with a spatula to distribute a
little more evenly, but take care not to crush the berries;
it’s fine if the lemon mixture isn’t perfectly even. Bake
until the lemon mixture just begins to form a shiny skin,
7 to 8 minutes.
Sprinkle the reserved topping over the lemon-
blueberry layer, pressing the streusel between your
fingers into small lumps as you sprinkle. Bake until the
filling is bubbling at the edges and the topping is brown,
25 to 30 minutes.
Let the bars cool in the pan on a rack until just warm,
about an hour. Carefully lift them out of the pan using
the foil overhang and transfer to a wire rack to cool
completely. Remove the foil and cut into 24 bars when
cool. The bars may be stored at room temperature for a
few hours but otherwise should be kept in the refrigerator.
blueberry streusel bars with lemon-cream filling
Always a hit at summer picnics, these addictive squares strike the perfect balance between tart and
sweet and chewy and crunchy. Yields 24 bars
room-temp
berries
Be sure to use room-
temperature berries.
Cold fruit straight
from the refrigera-
tor will prevent your
dessert from baking
evenly.
SWEETS & SIPS
82 GRILLING 2019