Keto Coffee Cake

4 organic eggs

1 protein powder

½ cup cashew butter

⅙ cup no-calorie sweetener

½ tsp ground cinnamon

1 tsp vanilla extract

1 tsp baking soda

1 baking powder

¾ cup almond flour

¼ cup butter

1 tsp cinnamon

¼ cup walnut pieces, optional

½ tbsp almond milk

¼ cup powdered sugar