Classic Blueberry Buckle Cake

Ingredients

• 1 + 1/2 cups all-purpose flour
• 3/4 cup light brown sugar
• 2 tsp baking powder
• 1/4 tsp salt
• 1 stick (1/2 cup) unsalted butter, melted
• 1/2 cup milk
• 2 large eggs
• 2 tsp vanilla extract
• zest from lemon (about 1 tbsp)
• 2 + 1/2 cups blueberries
• 1/2 cup all purpose flour
• 1/2 cup light brown sugar
• 1 tsp ground cinnamon
• 6 tbsp unsalted butter, melted