Preheat your oven to 400°F. Line a large, rimmed baking sheet with high-heat-resistant parchment paper (or foil).
Arrange the chicken drumsticks on the prepared pan. Spray them with olive oil and sprinkle with kosher salt, black pepper, garlic powder, and smoked paprika. Lightly spray them again.
Bake the chicken until golden brown and cooked through (its internal temperature should reach 165ºF), about 40 minutes.
10 minutes before the chicken is done, in a large bowl, whisk together the melted butter and hot pepper sauce. Set aside until the chicken is done.
Toss the cooked chicken pieces in the buffalo sauce until well coated. Serve immediately.
Video
Notes
It's a good idea to make the sauce in advance, while the chicken is cooking. This allows the sauce to slightly thicken, which helps it better adhere to the chicken. If you make the sauce at the last minute it is thinner, and then it tends to just slide off the chicken pieces.You can keep the leftovers in the fridge, in an airtight container, for 3-4 days. To avoid overcooked leftovers, reheat them covered in the microwave, at 50% power. They're also good cold!