Gluten-Free Lemon Blueberry Cake Recipe

Name: Gluten-Free Lemon Blueberry Cake Recipe
Prep time: 30 min
Cook time: 40 min
Total time: 1 h 10 min
Cuisine: American
Ingredients: 3 ⅓ cups 1:1 gluten-free flour with xanthan gum; 1 teaspoon baking powder; ½ teaspoon baking soda; 1 teaspoon kosher salt; 1 cup whole milk; ¼ cup fresh lemon juice; 1 tablespoon vanilla extract; 1 ½ cups granulated sugar; 1 tablespoon lemon zest; ¾ cup unsalted butter, room temperature; 8 ounces mascarpone cheese, room temperature; 3 eggs, room temperature; 2 cups fresh blueberries (or mixed berries); 1 ½ cups fresh blueberries; 1 large lemon (zest and juice); 1 ½ cups butter, room temperature; 6 cups powdered sugar; 2 teaspoons vanilla extract; ½ teaspoon kosher salt