preheat oven to 350 degrees and prepare cupcake liners
In a large mixing bowl whisk together sugar, flour, baking powder and salt.
Add the butter and beat with an electric mixer until the mixture looks sandy.
Combine the milk and vanilla and add, all at once. Mix at low speed for 30 seconds, then increase the speed to medium and beat for 30 seconds. Scrape the bottom and sides of the mixing bowl.Repeat this procedure with the second egg. Continue adding the eggs, scraping after each addition, until all 4 are added.
With the mixer running at low speed, add 1 egg. Increase the speed to medium and beat for 30 seconds.
Repeat this procedure with the second egg. Continue adding the eggs, scraping after each addition, until all 4 are added. After the last egg is added, scrape the bowl once more, then beat at medium-high speed for 30 more seconds.
Scoop by heaping 1/4-cupfuls into the prepared muffin tins. Bake 23 – 25 minutes.