Scrumptious baked lemon and blueberry doughnuts - Starts at 60

Ingredients

• 1/4 cup unsalted butter, melted
• 1/4 cup canola or vegetable oil
• 3/4 cup granulated sugar
• 2 large eggs
• 2 teaspoons vanilla extract
• 1-2 teaspoons grated lemon zest
• 1 cup buttermilk
• 2 2/3 plain flour
• 1 1/2 teaspoons baking powder
• 1/4 teaspoons baking soda
• 1/2 teaspoons salt
• 1 cup fresh blueberries
• 2 cups icing sugar
• 1-2 teaspoons lemon zest
• 7-8 tablespoons fresh lemon juice or milk