For the Streusel Topping:
½ cup (100g) brown sugar
½ cup (65g) all-purpose flour
1 tsp ground cinnamon
¼ cup (½ stick / 57g) cold unsalted butter, cubed
For the Cake:
2 cups (250g) all-purpose flour
2 tsp baking powder
½ tsp baking soda
1 tsp ground cinnamon
½ tsp nutmeg
¼ tsp salt
¾ cup (1½ sticks / 170g) unsalted butter, softened
1½ cups (300g) granulated sugar
2 large eggs, room temperature
1 tsp pure vanilla extract
½ cup (120ml) sour cream or plain yogurt
3 cups (450g) peeled & finely diced apples (Granny Smith, Honeycrisp, or Fuji)
💡 Pro Tips:
Toss apples in 1 tbsp flour—prevents sinking.
Room-temperature ingredients ensure even mixing.
Don’t overmix after adding flour—keeps cake tender.
Step-by-Step Instructions (Spiced, Juicy, Foolproof)
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