In a small saucepan over low heat, melt the butter. Stir in the Frank's RedHot and lemon juice until smooth, 1–2 minutes. Remove from heat and set aside.
Mix the Patties
Combine the ground chicken, breadcrumbs, 2 tbsp buffalo sauce, celery, green onion, and seasonings. Mix just until combined - do not overmix or the burgers will get dense
Form and Chill
Form the ground chicken mixture into 4 patties about ¾ inch thick. Chill at least 10 minutes.
Grill
Preheat your grill to grill to 400–450°F. Oil the grates. Grill patties 5–6 minutes per side, flipping once, until internal temp reaches 165°F.
Sauce and Serve
Brush the remaining buffalo sauce over hot patties and let it set.
Toast buns cut-side down 30–60 seconds. Spread the ranch dressing on the buns, add your favorite toppings, and serve immediately, with a little more ranch on top before adding the bun.
Notes
Ground chicken dries out fast - pull the burgers from the grill at exactly at 165°F and rest 2–3 minutes
The 10-minute chill for the ground chicken patties is not optional; it's what keeps the patties from tearing on the grates
Oil the grates right before cooking, not in advance - this helps the chicken from sticking
The buffalo sauce goes on after the patties come off the grill to avoid flare-ups
For a Charcoal grill: Set up the grill for direct heat with lit charcoal. Cover, adjust the air vents, and let the grill preheat to around 400–450°F. The char you get from charcoal is the best version of this burger. We use Cowboy Charcoal briquets and a classic Weber grill for burgers like these.
For a Gas grill: Turn all the burners to medium-high and preheat the grill to 400-450°. When you're ready to cook, make a two-zone fire by turning off 2 of the 4 or 1 of the 3 burners to reduce flare-ups from the butter in the sauce.
For a Griddle/flat top: Allow the griddle to preheat to around 400°F. Cook the chicken burgers over medium-high heat for 5–6 minutes per side. You lose the char marks, but the crust that develops on a hot flat top is genuinely good — press them slightly on contact for better surface contact, then leave them alone and don't pull or tug at them, or the burger will tear.