A method for flavouring highly-viscous sugar solution. In said method, a mixture of highly viscous sugar solution and extraction material is filled into a reaction vessel having a filling opening and an outlet opening, the outlet opening being disposed downstream of the filling opening. The mixture consisting of the extraction material and the highly viscous sugar solution is subsequently allowed to mature, lasting at least until an adequate separation of highly viscous sugar solution and extraction material has taken place via the flotation of the vegetable solids. Maturing can be rendered more efficient by optional mixing processes. If honey is not the substance to be flavoured, flavouring can be accelerated by heating. Finally, after the maturation period and separation phase are over, the enriched highly viscous sugar solution is allowed to flow out through the outlet opening. The process can be repeated until the extraction material is exhausted by replenishing highly viscous sugar solution.