Preparation Melt 2 tablespoons butter in small skillet over medium-low heat. Add chile powder and cumin; stir 10 seconds. Transfer to medium bowl; stir in honey and cool. Add oregano, coarse salt, granulated garlic, onion powder, and 6 tablespoons butter to butter mixture. Mix until smooth. DO AHEAD: Can be made 2 days ahead. Cover; chill. Bring to room temperature. Prepare barbecue (medium-high heat). Grill corn until charred in spots, turning often, about 13 minutes. Transfer corn to platter. Serve with honey-ancho butter.