1Melt butter in a large skillet over medium-high heat. Add minced garlic and cook for 30 seconds until fragrant.
2Add chicken pieces and cook for 8–10 minutes, stirring occasionally, until cooked through and lightly golden. Season with salt and pepper.
3Pour buffalo sauce into the skillet and toss chicken to coat evenly. Simmer for 2 minutes, then remove from heat.
4Warm tortillas by placing them in a dry skillet for 10 seconds per side, or wrap in a damp paper towel and microwave for 20 seconds.
5Lay each tortilla flat. Spread 1 tablespoon of ranch dressing down the center of each.
6Divide buffalo chicken evenly among tortillas, arranging it slightly off-center. Top each with shredded cheddar and sliced celery.
7Fold in the sides of each tortilla, then roll tightly from bottom to top, tucking as you go. Serve immediately with extra ranch on the side for dipping.