Almond extract is generally made from bitter almond oil, water, and alcohol. Alcohol is not strictly Paleo, but since no one ever consumes significant amounts of almond extract, it is certainly safe in this context.
The Fat Content of Almond Oil
Like almonds, almond oil consists largely of monounsaturated and polyunsaturated fats, with nominal amounts of saturated fat. The ratios of these fats that exist in almonds are not ideal, but as long as you consume them in moderation, and be sure to get plenty of saturated fat elsewhere in your diet, there’s no cause for concern. Since almond extract is only ever used in small amounts for flavor, there is no reason to freak out over its fat profile.
Mark Sisson has a post in which he calms readers’ fears of the PUFA content of almonds. As he points out, we never consume the fat by itself, we consume it in conjunction with other nutrients, which have a positive effect on how our body processes the fat. The same goes for almond extract: no one ever consumes it by itself, so adding a little to your Paleo cake or cookies is nothing to worry about.