Blueberry Muffins

Ingredients

• ½ cup all-purpose flour
• ½ cup granulated sugar
• ¼ cup unsalted butter, cubed
• 1 pinch salt
• 2 ½ cups all-purpose flour
• 1 teaspoon salt
• 2 teaspoons baking powder
• ¼ cup unsalted butter, melted
• ¼ cup vegetable oil
• 1 cup whole milk
• ¾ cup granulated sugar
• ¼ cup sour cream or plain yogurt
• 2 teaspoons vanilla extract
• 1 tablespoon lemon zest
• 2 eggs, room temperature
• ¼ cup lemon juice
• 8 ounces fresh blueberries