Shulchan Arukh, Orach Chayim 463/שולחן ערוך·אורח חיים תס״ג

1Whether it is permitted to roast two bundles of grain together and the laws of karmel (roasted grain). Containing 3 paragraphs: It is permitted to roast two bundles of grain together, and we are not concerned that perhaps moisture will pass from one to the other, as they are fruit juices and they do not cause leavening.

2Vitika, which is a dish made from oil and salt with flour, is permitted, provided that it does not contain water. Rema: And according to our custom, which is to be stringent with fruit juices, this too is forbidden.