In a small bowl, combine active dry yeast and sugar. Stir in warm water. Let sit for 10 minutes and 2-inch head of foam should appear on the top. (This is a good sign that your yeast is active and ready to be used.)
Meanwhile in the bowl of your stand mixer fitted with the dough hook attachment, add 2 cups flour, sugar, salt. Mix on low for 30 seconds until evenly combined.
Add in milk, melted butter, yeast mixture, and eggs, and mix on low until ingredients start to come together, about 1 minute.
Add in remaining 2 cups flour and mix on medium until all the flour is absorbed and a dough begins to form, about 2 minutes. Turn up mixer to medium high and mix for 7-8 minutes. A taut ball should form and the sides and bottom of the bowl should be empty.
Remove dough from the mixer, shape into a ball, then place into a glass or metal bowl sprayed with nonstick spray. Cover with a clean kitchen towel or plastic wrap and leave in a warm spot for 1 hour. The dough should double in size.
Prepare a 9x12x3 pan by spraying the bottom and sides with nonstick baking spray.
Once your dough has doubled in size, chill in refrigerator for 30 minutes.
At this point, you’ll want to work quickly, so your dough stays chilled and the filling doesn’t become messy as you roll and cut. Once chilled, set dough on a lightly floured work counter and roll into a 14×17 inch rectangle. (Make sure as you roll out your dough, you ensure it’s not sticking to the counter.) The long side of the rectangle should be facing you/even with your countertop.