How to make orange cake with crumble step by step

Step 1 - preparations

• Preheat the oven to 170℃ (fan-forced) or 180℃ (top/bottom heat mode).
• Line the baking pan with parchment paper or grease it with butter and sprinkle with flour/breadcrumbs.
  
• Squeeze the juice from the orange and grate its zest.

Step 2 - preparing the orange dough

• In a bowl, mix together the wet ingredients for the dough and orange zest.
  80 ml oil, 120 ml orange juice, orange zest, 120 g Greek yogurt, 2 eggs
  
• In a larger bowl, mix the dry ingredients for the dough.
  300 g all-purpose flour, 2 teaspoons baking powder, 150 g sugar
  
• Pour the wet ingredients into the dry and mix - the dough will be thick.
  
• If the dough is too thick and doesn't combine well, add a little more juice or milk.
  

Step 3 - preparing the orange crumble

• Transfer the crumble ingredients to a bowl.
  100 g butter, 150 g all-purpose flour, 70 g sugar, orange zest
  
• Crumble them together - with your fingers or a fork, until they combine into a lumpy mixture.
  

Step 4 - baking orange cake with crumble topping

• Transfer the orange dough to the prepared mold.
  
• Sprinkle with orange crumble on top.
  
• Place in a preheated oven and bake for about 30-40 minutes - until a dry skewer comes out clean.