Blueberry-Poppy Seed Squares (Borůvkový Koláč)

By CheeseDiva

Ingredients

• 20 tbsp. unsalted butter, softened, plus more for pan
• 3 cups flour, plus more for pan
• 1 1/2 cups sugar
• 3/4 tsp. kosher salt
• 1/4 tsp. vanilla
• 4 cups blueberries
• 2 tbsp. fresh lemon juice
• 1/2 tsp. ground cinnamon
• 1 1/2 cups ground poppy seeds (available at Kalustyan's)
• 1/2 cup heavy cream

Details

Servings 12
Adapted from saveur.com

Preparation

Step 1

1. Heat oven to 350°. Butter and flour a 9" x 13" metal baking pan; set aside. Beat 16 tbsp. butter and ½ cup sugar on medium-high speed of a mixer until pale and fluffy, about 2 minutes. Add 2½ cups flour and ½ tsp. salt; beat until just combined. Press dough into bottom and halfway up sides of prepared pan; chill for 20 minutes. Bake crust until lightly browned, about 12 minutes; let cool. Meanwhile, stir remaining butter, flour, and salt, ¼ cup sugar, and vanilla in a bowl until coarse crumbles form; set streusel aside.

2. Heat remaining sugar, 3 cups blueberries, lemon juice, and cinnamon in a 2-qt. saucepan over medium-high heat; cook until berries burst, about 20 minutes. Remove from heat and stir in remaining berries; let cool. Stir together poppy seeds and cream in a bowl; spread evenly over cooled crust. Pour blueberry mixture over poppy seeds; sprinkle with streusel mixture. Bake until filling is bubbly and streusel is lightly browned, about 40 minutes. Let cool, cut into squares, and serve.

I am trying to make this now, but the dough in step 1 doesn't appear to be much like dough.