When making Swedish cinnamon rolls (kanelbullar), or any similar rolled/knotted pastries, I have an issue with the filling oozing out of the pastry when baking it. Recipes are calling for a filling usually made with butter, sugar and spices. (The ratio being commonly 4 butter for 3 sugar, in weight + spices). When using that filling, I usually get a lot of leakage from the pastries, with a lot of the filling ending up on the baking tray.
Below, a picture illustrating the problem (brown filling on brown silicon mat is not the best, sorry):
Are there solutions to that problem?