NOTE: It is SUPER IMPORTANT that all the room temperature ingredients listed above are room temperature and not cold so that the ingredients mix and incorporate correctly.
Heat oven to 335º F/168º C.
Add butter to stand mixer and beat at medium-high speed until smooth and shiny, about 30 seconds. Gradually sprinkle in the sugar, beat until mixture is fluffy and almost white, about 3-5 minutes.
Add eggs one at a time, fully combining each egg before adding the next.
Add in your food coloring to the egg/butter/sugar mixture
Mix dry ingredients in a medium bowl and whisk to combine and set aside
Combine wet ingredients and set aside
With the mixer at the lowest speed, add about a third of the dry ingredients to the batter, followed immediately by about a third of the milk mixture, mix until ingredients are almost incorporated into the batter. Repeat the process 2 more times. When the batter appears blended, stop the mixer and scrape the sides of the bowl with a rubber spatula.