Instructions:
1. Preheat your oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.
2. In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
3. In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy. Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract and orange zest.
4. Gradually add the dry ingredients to the butter mixture, alternating with the orange juice and milk. Begin and end with the dry ingredients, mixing until just combined.
5. Pour the batter into the prepared cake pan and spread it evenly.
6. In a small bowl, combine the flour, sugar, cold cubed butter, and ground cinnamon. Use your fingers or a pastry cutter to mix the ingredients until you have a crumbly texture.
7. Sprinkle the crumble topping evenly over the cake batter.
8. Bake in the preheated oven for 35-40 minutes or until a toothpick inserted into the center comes out clean.
9. While the cake is cooling, prepare the glaze. In a small bowl, whisk together the powdered sugar and orange juice until smooth.
10. Once the cake has cooled slightly, drizzle the glaze over the top.
11. Allow the cake to cool completely before slicing and serving.
Enjoy your delicious orange cake with a crumble topping!
