What is the function of a rubber spatula?

The function of a rubber spatula is primarily to mix and fold soft ingredients. This tool's design features a flexible blade that allows it to easily scrape the sides of bowls and incorporate ingredients gently, which is essential when working with delicate mixtures such as whipped cream or cake batters.

When mixing or folding, using a rubber spatula helps to maintain the integrity of airy mixtures by preventing over-mixing, which can deflate the ingredients. Additionally, its versatility allows it to handle a variety of soft textures, making it indispensable in baking and cooking tasks.

Other options, however, pertain to functionalities that are better suited for different kitchen tools. For instance, measuring liquid ingredients typically involves using measuring cups or spoons rather than a spatula. Cutting firm shortening into pastry would require a pastry cutter or knife for efficient results, and separating solids from liquids is usually accomplished with a strainer or sieve.