Preheat your oven to 350 degrees. Grease an 8 x 8 inch square baking pan and line with parchment paper.
Combine your topping ingredients all together in a small bowl and set aside.
In a medium mixing bowl, combine your flour, salt, and baking powder. Set aside.
In a large mixing bowl, combine your sugar, shortening and egg until creamy. Mix in your dry ingredients with your milk and vanilla until fully combined.
Pour half of your batter into your baking pan, and top with half of your cinnamon sugar topping. Pour remaining half of your batter into your baking pan, and top the remaining batter with the remaining half of your cinnamon sugar topping.
Baking for 25 – 30 minutes (until a toothpick comes out clean).
Allow for your cake to cool for 10 – 15 minutes before serving.