Apple Crumble Cake

Ingredients

• 1/4 cup butter, softened
• 1/2 cup brown sugar
• 1/4 cup applesauce
• 1/4 cup plain Greek yogurt
• 1 teaspoon vanilla extract
• 1 cup flour
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 1 teaspoon cinnamon
• 1/2 teaspoon powdered star anise
• 2 cups thinly sliced apples
• 1/4 cup flour
• 1/4 cup quick oats
• 1 teaspoon cinnamon
• 4 Tablespoons cold butter
• 1/4 cup powdered sugar
• 1 teaspoon water