• Pre-heat the oven to 175℃/350℉. Line a 9x13" rectangle baking pan.
• In a large bowl, whisk together the butter and sugar on high speed for a few minutes to really bring it together. Add in the eggs and vanilla and whisk again.
• Use a spatula/wooden spoon to fold in the flour, baking powder and baking soda until a cake batter comes together.
• Add the cream, milk and sprinkles and fold in to create a nice smooth batter. Pour into the prepared cake tin and bake 30-35 minutes until golden and a skewer inserted comes out clean. Let cool.

For the Frosting

• Once the cake is cool, make the frosting. Whisk the butter on high using an electric mixer. Add in half of the powdered sugar and the vanilla and whisk to combine. Add the remaining powdered sugar and whisk to create the frosting. Add a splash of milk to thin if necessary.
• Use a palette knife to spread the frosting over the cake. If decorating, place the remaining frosting into a piping bag with a flat nozzle to create the border (like in my photos). Finally, scatter over sprinkles before serving!