Blueberry Crumb Bars with Lemon Cream Filling

Ingredients

• 0.5 teaspoon double-acting baking powder 
• 2 cups blueberries 
• 1 cup brown sugar 
• 1 large eggs separated ()
• 1 cup flour all-purpose
• 0.3 cup juice of lemon 
• 1 teaspoon lemon zest grated
• 1 cup rolled oats 
• 0.5 teaspoon salt 
• 10.5 ounce condensed milk sweetened canned
• 0.8 cup butter unsalted melted ()
• 1 cup flour whole wheat

Equipment

• bowl
• oven
• baking pan

Directions

1. Mix the butter, flours, rolled oats, sugar, salt and baking powder in a large bowl until it forms crumbs.
2. Set 1 cup of the mixture aside for the topping.
3. Mix the egg white into the mixture.
4. Press the mixture into the bottom of a greased 8 inch square baking pan.
5. Bake in a preheated 350F oven for 10 minutes.
6. Meanwhile mix the egg yolk into the sweetened condensed milk, lemon juice and zest and let it sit.
7. Spread the blueberries out over the bottom crust and top with the lemon mixture.
8. Bake until the lemon mixture forms a shiny skin, about 7-8 minutes.
9. Sprinkle on the reserved crumbs.1
10. Bake until the top is golden brown and the sides are bubbling, about 20-25 minutes.