Corn. If you like corn based whiskey, you will love this stuff. The corn variety used in this batch is food grade #1 White from South Texas. This was aged three years in Oak and released in 2020. 94 proof, The bottle reads as follows: “Every bottle of Garrison Brothers is overflowing with the finest gourmet grade ingredients on the planet. The nectar inside was made from sweet mash-bill and heat forged in the scorching Texas sun, extracting all the flavor possible from our new American white oak barrels, yielding a darker richer and fuller bourbon than any out there.“ My personal take, this stuff is goooooood. My novice tasting notes: The nose is sweet corn and not full of alcohol. It drinks smooth. stays warm after sipping. On a rock it gets sweeter and smoother.