Heat oil in a deep fryer or in a large saucepan to 300°F (150°C).

In a bowl, beat together coconut milk, all-purpose flour, egg, almond flour, coconut flour, honey, and guar gum using a hand mixer until the mixture resembles thick pancake batter.

Drop batter by rounded spoonfuls, in batches, into the hot oil. Fry until the donuts are dark brown, about 3 to 5 minutes. Transfer donuts to a paper-towel-lined plate with a slotted spoon.