• 

  unsalted butter to grease

Streusel Topping

• 

  all-purpose flour

  6 oz
• 

  sugar

  1 ½ oz
• 

  brown sugar

  1 ½ oz
• 

  salt

  ¼ tsp
• 

  ground cinnamon

  ¼ tsp
• 

  unsalted butter diced, cold

  3 oz

Cake Batter

• 

  lemon quartered

  1
• 

  sugar

  10 oz
• 

  large eggs

  3
• 

  plain yogurt

  4 oz
• 

  olive oil

  4 oz
• 

  vanilla extract

  1 tsp
• 

  all-purpose flour

  9 oz
• 

  poppy seeds

  2 tbsp
• 

  baking powder

  2 tsp
• 

  baking soda

  ¼ tsp
• 

  salt

  ¼ tsp
• 

  confectioners sugar (可选的) to dust
• 

  whipped cream to serve (optional)