Preheat oven to 375℉. Line two baking sheets with parchment paper, and set aside.
In a large saucepan over medium heat, add sliced butter, water, and sugar. Bring the mixture to a boil, making sure to stir occasionally.
Using a wooden spoon, slowly stir in the flour. The mixture will start to pull away from the edges and form a ball. This should take 1-2 minutes.
Remove the dough from the saucepan and put it in a glass heat-proof bowl. Let it cool for 3-4 minutes.
Mix in one egg at a time using a wooden spoon. Make sure the egg is mixed well before adding the next egg. Once all the eggs have been added, transfer the dough into a piping bag with a ½-inch round piping tip.
Pipe the dough on the prepared baking sheet. Pipe 2-inch circles starting in the center of the circle, moving outward, and going up and back into the center of the circle. They should end up being 2 inches wide and about 2 inches tall. Continue doing this until all the dough is done. If there are any pointed peaks, dip your finger in water and gently brush them down.
Bake for 30-35 minutes or until the cream puffs start to turn slightly golden brown on top. Remove the puffs from the oven and let them cool on the pan for 3-4 minutes, then gently transfer them to a wire cooling rack.