blueberry muffins

• 5 T butter or coconut oil
• 1/2 cup sugar
• 1 egg
• 2 c flour
• 3/4 t baking powder
• 1/4 t baking soda
• 1/4 t salt
• 3/4 c yogurt–vanilla flavored or blueberry kefir
• 2 t lemon juice
• 1 c frozen blueberries

Mix the lemon juice and blueberries.  Combine all of the wet ingredients and then the dry.  Add the blueberries last.  Bake 350 for 20 minutes