All American Buffalo Chicken Sandwiches

1 cup crumbled blue cheese (about 4 ounces)
1 cup low-fat buttermilk
Coarse salt and ground pepper
1 cup all-purpose flour
1 1/2 pounds chicken tenders
1/2 cup vegetable oil, such as safflower
1/3 cup hot sauce
2 tablespoons melted butter
Directions
Preheat oven to 250 degrees. Place a wire rack on a rimmed baking sheet, and transfer to oven. In a medium bowl, stir together blue cheese and 1/2 cup buttermilk. Season dip with salt and pepper, and set aside.
Place flour and remaining 1/2 cup buttermilk in separate medium bowls; season with salt and pepper. Set out another rimmed baking sheet alongside. Dip chicken in buttermilk (allowing excess to drip off), then in flour (shaking off excess); place on sheet.
In a large skillet, heat oil over medium-high. Working in batches, fry chicken until golden brown and cooked through, 3 to 4 minutes per side. Transfer to rack in oven to keep warm.
In a large bowl, stir together hot sauce and melted butter. Add chicken, and toss to coat. Serve tenders on hamburger buns with blue-cheese dip.