For the Coffee Cream Puffs:
Preheat the oven to 400°F. Line a baking sheet with parchment paper.
In a saucepan, melt butter in water over medium heat.
Stir in flour and sugar until the mixture forms a dough.
Remove from heat and let cool slightly.
Add eggs one at a time, beating well after each addition.
Stir in instant coffee granules.
Spoon dough into a pastry bag and pipe 12 puffs onto the baking sheet.
Bake for 25 minutes or until golden and puffed. Let cool completely.
For the Coffee Cream Filling:
Whip heavy cream until soft peaks form.
Add powdered sugar, instant coffee granules, and vanilla extract.
Beat until stiff peaks form and the cream holds shape.
Cut the cream puffs in half and pipe or spoon in the coffee cream.