• Preheat Oven: Preheat oven to 356ºF (180ºC). Line a square 8x8 inch baking pan with parchment paper, set aside. NOTE: Alternatively, if you have a non-stick pan, liberally grease it with melted butter and dust it with a light layer of flour. This will leave your finished cake with smooth sides.
• Mix Dry Ingredients: In a medium-size mixing bowl, add flour, baking powder, and salt. Whisk until well combined. Set aside.
• Beat Butter & Sugar: In a large mixing bowl using electric hand beaters or a stand mixer with the paddle or whisk attachment, beat the softened butter and sugar on medium speed for 2 minutes until pale and creamy, scraping down the sides as needed.
• Incorporate Eggs: Add eggs one at a time, beating for 10 seconds after each addition. Scrape down the sides as needed.
• Add Liquids: Pour in milk, oil, and vanilla. Beat for 15 seconds until well combined. Scrape down the sides again.
• Combine with Dry Ingredients: Add half of the dry flour mixture and beat until just combined. Scrape down the sides and add the remaining flour. Beat until incorporated, ensuring not to over-beat, just until the flour has combined then turn off the beater. If some excess flour is still visible around the sides of the bowl, gently fold it in with a spatula. Over-beating can make the cake tough and dense after baking.
• Pour and Smooth: Pour the batter into the lined pan and smooth out the top with a spatula.
• Bake: Bake for 30-35 minutes, or until a skewer inserted into the middle comes out clean and it springs back when pressed lightly with your finger.
• Cool: Remove from oven and allow to cool in the pan for 10 minutes.
• Transfer to Cool: Carefully remove from pan and transfer to a wire rack to cool completely.

Vanilla Buttercream Frosting

• Beat Butter: In a large mixing bowl, beat the softened butter for 2 minutes until creamy.
• Add Sugar Gradually: Gradually add powdered sugar, half a cup at a time, beating well (about 15 seconds) after each addition.
• Add Milk and Vanilla: Add milk, vanilla extract and salt and then beat for 1 minute until the frosting is light and fluffy.
• Frost Cake and Add Sprinkles: Once the cake is completely cooled, spread the vanilla buttercream frosting evenly over the cake. Add sprinkles.
• Serve: Cut into squares and serve. Enjoy!