Slice Cheddar when it has had some time to warm up.
How much is a cup? 1 oz (24 g) ungrated = 1/4 cup (60 mL) grated 2 oz (56 g) ungrated = 1/2 cup (125 mL) grated 8 oz (224 g) ungrated = 2 cups (500 mL) grated
Use as fine a grater as possible, or a micro cheese plane, to ensure even melting without overheating.
Cheese is rich with protein and has a tendency to become tough and stringy when heated at too high a temperature. Rapid cooking will also create lumps in either the roux or the cheese. See our recipe for Basic But Perfect Cheese Sauce.