California-Style 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.