Summer Nectarine Streusel Cake - Bake with Amy

Ingredients

• ½ cup butter (at room temperature)
• ¾ cup white sugar
• 2 eggs (at room temperature)
• 1 tsp vanilla extract
• ½ cup milk (at room temperature)
• ½ cup sour cream (at room temperature)
• 2 cups all purpose flour
• 2 tsp baking powder
• ¼ tsp salt
• 1 tbsp butter (to grease tin)
• 4 fresh nectarines
• ⅔ cup all purpose flour
• ⅔ cup white sugar
• 4 tbsp melted butter
• ½ tsp cinnamon