Preheat oven to 375°F, prepare cookie sheet lined with parchment paper or a silicon mat.
In a large pot, add water, milk, butter, and bring to a boil.
Once boiling, remove from heat and add flour. With a wood or plastic spoon, start mixing. Add back to element and continue to mix vigorously until the dough pulls away from the side of the pot and a film forms on the bottom of the pot.
Add dough to a large bowl. Add one egg at a time until each egg is incorporated. Don’t worry that every time an egg is added the dough separates. It will come back together.
Add dough to a large piping bag with a 2A wilton tip or a large circular pastry tip. Pipe 1.5 inch circles 2 inches apart on the lined cookie sheet. Wet finger in cold water to fix any imperfections or points. Lightly flick cool water onto the cookie sheet.
Remove craquelin from freezer. Using a circular cutter or circle traced on paper, cut rounds out about 2-2.5 inches in diameter. Place disks on top of each cream puff.
Place in oven and bake for 35 mins or until a golden amber color. Remember, do not open the door!
Once done, place on cooling rack. Let cool completely before adding the filling.