Preheat the oven to 425°F (220°C).
Line a baking sheet with parchment paper.
In a large mixing bowl, combine the ground chicken, egg, almond flour, green onions, garlic, salt, and pepper until just mixed.
Use a small cookie scoop to portion the mixture into 16 meatballs. Roll each meatball gently between your palms to create a uniform shape.
Arrange the meatballs on the prepared baking sheet, leaving about 1 inch of space between each one.
Bake for 18–20 minutes, or until the meatballs are cooked through and reach an internal temperature of 165°F (74°C).
While the meatballs bake, melt the butter in a large nonstick skillet over medium-low heat.
Stir the hot sauce into the melted butter until well combined.
Add the baked meatballs to the skillet and toss gently until evenly coated in the buffalo sauce.
Transfer to a serving platter, insert toothpicks if desired, and serve with blue cheese dressing.