• Preheat the oven to 350℉. For easy removal of the cake, place parchment paper on the bottom of the springform pan and grease the sides all around. Peel and cut one of the apples into small cubes, and shred the other one with the large side of the grater. Set aside.
  2 medium sized Granny Smith apples

For the streusel

• In a medium sized bowl, add flour, white sugar, and softened butter. Using a fork or your hands, mix this until combined and crumbly. This will be your streusel. Set aside in the fridge when done.
  3/4 cup all-purpose flour, 5 tbsp butter, 1/3 cup white sugar

For the cake

• In another medium sized bowl, add in flour, cornstarch, baking soda, baking powder, and salt. Stir to combine and set aside.
  1 1/2 cups all-purpose flour, 1 tbsp cornstarch, 3/4 tsp baking powder, 1/2 tsp baking soda, 1/4 tsp salt
• In a large bowl, add the butter and sugar. Cream together for 2-3 minutes on medium speed until well combined and pale in colour.
  1/2 cup butter, 3/4 cups white sugar
• Add in the eggs, and mix on medium speed until smooth. This should take about 2-3 minutes.
  2 large eggs
• Add in the sour cream and vanilla and continue mixing until combined.
  1/4 cup sour cream, 1 tbsp vanilla
• Add the dry into the wet and using a spatula, gently mix until just combined and no flour streaks appear.
• Add the apples into the batter and mix until just combined and evenly distributed. Don't over-mix!
  2 medium sized Granny Smith apples
• Transfer the batter into the prepared springform pan and spread evenly. Sprinkle the streusel evenly on top.
• Bake the cake for 50-60 minutes or until a toothpick inserted comes out clean. Every oven differs, so keep an eye on it after 45 minutes. Mine took 1 hour total.
• When the cake is ready, turn your oven off and slightly open your oven door and allow to hot air to come out. Keep it like this for 5 minutes before removing the cake from the oven and placing it on your counter to cool.
• This cake can slightly drop in the middle after baking, this is normal. You can prevent it from dropping more by doing the step above, and also not 'slamming' it onto your counter (Gently moving it).
• Allow the cake to cool completely before slicing and enjoy! This cake is so delicious and simple to bake.
• This cake stays good on your counter for 1-2 days, and in an airtight container in the fridge for up to a week.