Grate 8 ounces sharp cheddar cheese using the fine holes on a box grater until finely shredded with no large chunks to prevent grainy texture.
8 ounces sharp cheddar cheese
In a large mixing bowl, combine room-temperature cream cheese (8 ounces), mayonnaise (½ cup), garlic powder (½ teaspoon), onion powder (½ teaspoon), and Worcestershire sauce (1 teaspoon). Mix until smooth and evenly combined with no lumps.
8 ounces cream cheese, ½ cup mayonnaise, ½ teaspoon garlic powder, ½ teaspoon onion powder, 1 teaspoon Worcestershire sauce
Fold in the grated cheddar cheese and mix thoroughly until cheese is evenly distributed throughout the mayo mixture, scraping the bowl sides to catch unmixed spots.
8 ounces sharp cheddar cheese
Drain one 4-ounce jar of diced pimentos and pat dry with paper towels. Gently fold pimentos into the cheese mixture until evenly distributed, avoiding overmixing to keep pimento pieces intact.
4 ounces diced pimentos
Cover the bowl and chill the mixture at least 1 hour so flavors meld and the spread firms to a spreadable consistency. Taste after chilling and adjust seasoning if needed.