Slice the hard-boiled eggs in half, length-wise, and transfer the yolks into a large bowl. Set the cooked egg white halves onto a large plate.
Mash the yolks with a fork, add the mashed avocado and garlic powder and mix to combine. Add the bacon crumbles and fold to combine.
Transfer the filling to a plastic zip bag or piping bag. Cut the end and pipe the filling into each egg white half. Alternatively, use a spoon to fill the egg halves with the mixture.
Place the deviled eggs onto the plate and refrigerate for 1 hour before serving.
Notes
Make-Ahead: Deviled eggs are best eaten within 24 hours; they can be made the day ahead and kept refrigerated in an airtight container.
Leftover Deviled Eggs: Leftovers can be kept refrigerated for several days, but may not look as pretty.