Blueberry Lemon Cupcakes

INGREDIENTS

• 1 1/4 cups all-purpose flour
• 1 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 cup granulated sugar
• 1/3 cup oil
• 1 cup coconut milk
• 2 teaspoons vanilla extract
• 1 teaspoon finely grated lemon zest
• 1 teaspoon lemon juice
• 6 oz. fresh blueberries
• Lemon Buttercream:
• 1/2 cup (1 stick) butter or margarine, room temperature
• 3 - 3 1/2 cups confectioners' sugar
• 2 tablespoons lemon juice (or more to taste)
• 1 teaspoon lemon zest
• 2 tablespoons heavy cream
• food coloring, optional