In a large mixing bowl, combine the grated cheddar cheese, softened cream cheese, pimento peppers, mayonnaise, garlic powder, onion powder, cayenne pepper, jalapeño, and black pepper.
Mix the ingredients together using a hand mixer, stand mixer, or sturdy spatula until the mixture becomes creamy and fully combined.
Taste the Pimento Cheese Recipe and adjust seasoning with additional salt, black pepper, or cayenne pepper if desired.
Transfer the mixture to a serving bowl.
Serve immediately with crackers, vegetables, toast, or sandwiches, or refrigerate for later.
If chilled, allow the pimento cheese to sit at room temperature for about 30 minutes before serving for the best texture.