Using ingredient glass baking dish with a paper towel

Blueberry Buckle

• 9 glass baking dish with a paper towel
• 2 blueberries
• 1 egg
• 250 gr sugar
• 190 gr all purpose flour
• 120 ml milk
• 55 gr soft butter
• 50 gr soft shortening
• 40 gr flour
• 9 gr baking powder