1. Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper or lightly grease it with butter or cooking spray.
2. Shred sharp cheddar cheese by hand or use a food processor for the freshest and smoothest texture.
3. Measure and prepare all ingredients, including mayonnaise, diced pimentos, butter, flour, and any optional spices or add-ins.
4. In a large mixing bowl, combine flour and softened unsalted butter. Blend using your hands or a pastry cutter until the mixture achieves a coarse crumb texture.
5. Stir in a pinch of salt or any optional dry seasonings like garlic powder or onion powder for added flavor.
6. In a separate medium-sized bowl, mix together shredded cheddar cheese, mayonnaise, and diced pimentos until the mixture is smooth and well combined.
7. Add any desired optional seasonings or extras, such as diced jalapeños, cayenne pepper, fresh herbs, or bacon, at this stage.
8. Roll out the prepared dough on a floured surface until it is about 1/4-inch thick. Use a knife or pizza cutter to slice into square shapes.
9. Spread a generous portion of the pimento cheese mixture onto half of the squares, leaving a slight border around the edges.
10. Place another square of dough on top of each cheese-covered square, pressing the edges together with a fork to seal them.
11. Arrange the assembled squares on the prepared baking sheet with equal spacing between each piece.
12. Brush the tops of the squares lightly with melted butter for a golden, crispy finish.
13. Bake in the preheated oven for 15-18 minutes, or until the edges turn golden brown. For extra crispness, bake for an additional 1-2 minutes while monitoring closely.
14. Remove from the oven and allow the squares to cool for a few minutes before serving.
15. Serve as a tasty standalone snack, accompany with a side salad, or pair with a dipping sauce like garlic parmesan for added flavor.
16. Store leftover squares in an airtight container at room temperature for up to 12 hours, or refrigerate them for up to 4-5 days. Reheat in the oven at 350°F for 5-7 minutes before serving again.
17. For long-term storage, freeze cooled squares in a freezer-safe container. When ready to use, thaw overnight in the refrigerator and reheat in the oven for 10-12 minutes.