For easy spreading allow butter or margarine to stand at room temperature to soften. Or cream butter or margarine so you can spread it thinly and evenly.
For large scale sandwich making, soften butter by beating 1 tablespoon hot water into 4oz (100g) butter. This is best done in a blender or food processor and makes a spread that is easy to handle and more economical.
Flavoured butters will improve the taste. Try adding a little made English mustard to butter and use for roast beef or cheese sandwiches; horseradish butter is good for tongue. Add finely grated orange rind for ham or chicken, grated cheese for tomato, lemon juice for seafood, and anchovy paste or chopped chives for egg fillings.