Best Lemon Blueberry Babka Recipe - How to Make Lemon Blueberry Babla

Ingredients

• 1/2 c. lukewarm whole milk
• 1/4 c. granulated sugar, plus 1 tsp, divided
• 1 (0.25-oz.) package active dry yeast
• 2 3/4 c. all-purpose flour, plus more for surface
• 1 tsp. kosher salt
• 2 large eggs
• 1 tsp. pure vanilla extract
• Zest of 1 large lemon
• 4 tbsp. butter, softened, plus more for pan
• 2 c. fresh or frozen blueberries
• 1/4 c. granulated sugar
• Juice of 1/2 lemon
• 1/2 c. powdered sugar
• Juice and zest of 1/2 lemon