Chocolate Rye Malt starts as rye malt and is roasted the way barley becomes chocolate malt — dry-kilned to a deep colour, developing roast and coffee character on top of rye's own naturally spicy, earthy flavour rather than the cleaner base rye malt brings before roasting. The result is a genuinely distinct flavour from either standard chocolate malt or unroasted rye malt alone: roast and spice together, rather than one or the other.
At 300-400 °Lovibond, it darkens a beer substantially even at a modest addition, in the same general range as standard chocolate malt. Like any heavily roasted grain it carries no diastatic power once kilning finishes, and it retains rye's other real handling consideration — a rye-derived beta-glucan load that, at higher percentages combined with other rye products in the same grist, can still contribute to a thicker mash, though a modest 10% ceiling addition of Chocolate Rye Malt alone rarely causes real trouble. Rye porter and rye stout are its clearest home, valued for a roast-and-spice combination neither standard chocolate malt nor plain rye malt delivers alone. A blend of standard chocolate malt and a smaller rye malt addition can approximate the flavour where Chocolate Rye Malt specifically isn't stocked, though the two flavours read as more separate rather than fully integrated the way genuine Chocolate Rye Malt does.