Add grilled corn on the cob to the menu for your next backyard cookout.
Bring a small pot of salted water to a boil. Blanch the herbs; transfer to bowl of ice water to stop cooking. Squeeze excess water from herbs; mince with a sharp knife. Transfer herbs to the bowl of a food processor, add 1/2 pound butter, process until well combined and butter is green; season to taste. Transfer herb butter to plastic wrap, and refrigerate or freeze until needed.
Divide the remaining pound of butter between two bowls. Add the chile powders to one bowl. Combine thoroughly with a rubber spatula; season to taste. Transfer to plastic wrap, and refrigerate or freeze until needed. Repeat with curry powder.