Blended Grain

“Blended Grain” is a sales/title phrasing some bottlers use on labels for grain-only Scotch blends. Legally these are Blended Grain Scotch Whisky—a blend of two or more Single Grain Scotch Whiskies from different distilleries—and they must still meet all Scotch rules. This is distinct from Blended Scotch Whisky, which mixes malt and grain. 

On Whiskybase, “Blended Grain” is used as a brand label to group such releases across bottlers. Searching under this brand returns many entries rather than one proprietary brand.