Moist Apple Crumble Coffee Cake - Home Recipe Guide

Ingredients

• 1 cups ½ all-purpose flour
• 1 tsp ½ baking powder
• ½ tsp baking soda
• ¼ tsp salt
• ½ cup unsalted butter, softened
• ¾ cup granulated sugar
• 2 large eggs
• 1 tsp pure vanilla extract
• ½ cup sour cream or plain Greek yogurt
• 2 medium apples, peeled and finely chopped
• 1 tsp ground cinnamon
• 1 tbsp all-purpose flour
• ½ cup light brown sugar, packed
• ⅓ cup all-purpose flour
• ½ tsp ground cinnamon
• ¼ tsp ground nutmeg
• 4 tbsp unsalted butter, cold and diced
• ½ cup powdered sugar
• 1 tbsp 1–2 milk
• ½ tsp vanilla extract