Preheat oven to 450 degrees.
Bring water and butter to boil. Add the cup of flour all at once and mix it with a wooden spoon until the dough pulls away from the pan in a ball and forms a thin film in the pan. Remove the dough from the heat.
Add the blue cheese, Dijon mustard, pepper and herbs to the dough. Transfer dough to a mixing bowl and allow to cool for a few minutes. Beat the eggs into the mixture, one at a time, with an electric mixer, using the paddle attachment.
Place parchment paper on baking sheets. Scoop dough onto the baking sheets, one tablespoon at a time, using a tablespoon cookie dough scooper. puffs into oven and bake for about 10 to 15 minutes, turn heat down to 350 degrees and bake for another 10 minutes. Turn oven off and allow pastry to dry out until the oven is cool (another 10 to 20 minutes). Remove baking sheets from oven and enjoy! These also freeze well so you can make them ahead of time!