Preheat the oven to 350°F (175°C). Grease and flour a cake pan.

In a mixing bowl, cream together the softened butter and sugar until light and fluffy.

Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.

In another bowl, combine the flour, baking powder, and salt. Gradually add to the butter mixture, alternating with milk, until well combined.

Pour the batter into the prepared cake pan and smooth the top.

Bake in the preheated oven for 25-30 minutes or until a toothpick inserted into the center comes out clean.

Allow the cake to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.

In a mixing bowl, beat the softened butter until creamy.

Gradually add the powdered sugar, mixing well until smooth.

Add milk and vanilla extract, and mix until the frosting is fluffy. Add food coloring if desired.

Once the cake is completely cooled, spread the frosting evenly over the top and sides of the cake.

Decorate with additional fun toppings like sprinkles or edible decorations to resemble Max and Ruby.