Cook the chicken right: For the most tender result, poach chicken breasts in lightly salted water with a bay leaf until just cooked through (about 12–15 minutes). Cool completely. Rotisserie breast meat also works if you’re short on time.
Get the texture perfect: Pulse cooled chicken in a food processor 3–5 times until it’s finely chopped but not paste-like.
Or use two forks to shred, then chop with a knife. Aim for tiny, soft pieces for that signature scoopable texture.
Prep the mix-ins: Finely mince the celery so there’s crunch without big chunks. Grate a little onion over the bowl to capture its juice without overpowering.
Make the creamy base: In a large bowl, whisk 1/2 cup mayo, lemon juice, salt, pepper, and sugar (if using).
Add a pinch of garlic powder if you like.
Combine: Fold in the chicken, celery, and onion. Mix gently until everything is evenly coated. Add more mayo a tablespoon at a time until it’s creamy but not soupy.
Taste and adjust: Add a pinch more salt or lemon if it needs brightness.
It should taste clean, savory, and lightly tangy.
Chill: Cover and refrigerate for at least 1 hour. This step helps the flavors meld and firms up the texture.
Serve: Scoop onto a split croissant, spoon into lettuce cups, or pair with crackers and sliced tomatoes. Garnish with a light grind of pepper if you like.