Stir ripe olives and rosemary into softened butter.
American Regional Flavor Variations: Dairy State Butter: Stir 2 Tbsp. grated Parmesan cheese and 2 Tbsp. finely grated cheddar cheese into 1/2 cup softened butter. East Coast Butter: Stir 2 tsp. Old Bay seasoning and 1-1/2 to 2 tsp. grated lemon zest into 1/2 cup softened butter. Heartland Butter: Stir 2 tablespoons crumbled Maytag blue cheese into 1/2 cup softened butter. Southwest Butter: Stir 1-1/2 tsp. grated lime zest, 1 tsp. minced fresh cilantro and 1/2 tsp. ground chipotle pepper into 1/2 cup softened butter.