A typical 1 biscuit serving of biscuit contains 4.2 grams of protein (7 g per 100 g), which makes it a moderate source of protein. That covers roughly 8% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Only about 8% of the calories in biscuit come from protein, so it is more of an energy food than a protein food. It is worth eating for other reasons; the protein it adds to a day is incidental.
Among the 111 grains in the database, biscuit ranks 57th by protein per serving, and 533rd out of all 796 foods on the site. Set against whole wheat matzo, another grain entry in the database, a serving carries about 0.5 g more protein (whole wheat matzo has 3.7 g per 1 matzo).
It is an incomplete protein on its own; pairing it with other plant foods across the day covers the full range of essential amino acids. The serving above is counted by piece at 60 g. Because pieces vary, the per-100 g figure is the one to use when comparing this against a food measured a different way.
Source: USDA FoodData Central #172670 - "Biscuits, plain or buttermilk, prepared from recipe" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Biscuit protein FAQ
How much protein is in biscuit per 100 g?
Biscuit has 7 g of protein per 100 g. A typical 1 biscuit serving (60 g) provides 4.2 g.
Is biscuit a complete protein?
No. Biscuit is an incomplete protein on its own; pairing it with other protein sources across the day covers the full range of essential amino acids.
How much of the Daily Value does a serving of biscuit cover?
A 1 biscuit serving of biscuit contains 4.2 g of protein, about 8% of the 50 g reference Daily Value.
Is biscuit a good source of protein?
Biscuit is a moderate source of protein, and about 8% of its calories come from protein, which makes it more of an energy food than a protein food. Set against whole wheat matzo, another grain entry in the database, a serving carries about 0.5 g more protein (whole wheat matzo has 3.7 g per 1 matzo).