Bonefire will be used for the cooking. You can unlock bonfire recipe by collecting required Recipes. you must have to kept it into the house.
How to Craft Bonfire in Frozen Flame
To craft bonfire you required 4x Branches and 4x Stone.
You can find some Branches on the ground, but it would be much easier to cut down one of the many Trees in this area.
Stone can be found on the ground, and there are usually more of them near bigger rocks and cliff faces.