What is the purpose of rinsing grains during the no-sparge method?

In the no-sparge method, the primary goal is to extract as much residual sugar from the mash as possible without the need for a separate sparging step. This method involves mashing the grains and then directly transferring the entire mash to the kettle for boiling, without rinsing the grains with additional water.

By rinsing grains in traditional brewing methods, a brewer typically aims to extract remaining sugars that weren't dissolved during the initial mashing process. However, in the no-sparge approach, this step is intentionally omitted to conserve time and minimize water usage. Rinsing grains wouldn't apply to this method because the intention is to maximize the efficiency of sugar extraction from the initial mash while preventing over-extraction of undesirable flavors, which can sometimes occur with conventional sparging.

Therefore, the focus on extracting residual sugars aligns perfectly with the no-sparge technique, making it the correct choice.