Please read About Choux Paste.

Preheat the oven to 400°F. Prepare:

Scoop the paste into a pastry bag fitted with a ½-inch plain tip. Alternatively, scoop into a plastic bag and cut off the corner to form a ½-inch hole. Pipe the paste into forty-eight 1-inch puffs on two ungreased baking sheets. Bake for 15 minutes. Reduce the oven temperature to 350°F, rotate the baking sheets front to back, and bake until browned and firm, 10 to 15 minutes more. Have ready:

For the chunkier fillings, split the puffs, place 1 tablespoon filling on the bottom halves, and replace the tops. For smoother fillings, use the same method or pierce the unsplit puffs in the side and pipe filling into them using a pastry bag fitted with a large plain tip.