Streusel Coffee Cake (Averiecooks) Recipe

Ingredients

• 3/4 cup all-purpose flour, plus 1 to 2 tablespoons more if needed
• 1/4 cup granulated sugar
• 1/4 cup light brown sugar, packed
• 1/2 teaspoon salt, or to taste
• 6 tablespoons unsalted butter, melted
• 1 cup all-purpose flour
• 3/4 cup granulated sugar
• 2 teaspoons baking powder
• 1/2 teaspoons salt, or to taste
• 1 large egg
• 1/2 cup buttermilk
• 1/4 cup canola or vegetable oil
• 2 teaspoons vanilla extract
• 1 cup fresh blueberries, plus 1/4 cup more for sprinkling on top if desired