Blueberry Coffee Cake

Streusel

• butter, unsalted to grease
• 70 g sugar
• 60 g brown sugar
• 30 g all-purpose flour
• 1 tsp cinnamon, ground
• ¼ tsp salt
• 1 pinch ginger, dried, ground
• 1 pinch nutmeg, ground
• 30 g pecan nut, chopped

Cake

• 170 g plain yogurt unsweetened
• 60 g vegetable oil
• 170 g sugar
• 1 tsp vanilla extract, natural
• 2 egg, large (65-70 g)
• 230 g all-purpose flour
• 1 tsp baking powder
• ½ tsp baking soda
• ½ tsp salt
• 1 pinch nutmeg, ground
• 285 g blueberry
  或 285 g frozen blueberries