Add psyllium husks and water to a medium-sized bowl and whisk to combine. Set the mixture aside for a couple of minutes for the gel to form. In a separate bowl add the raisins and cover them with boiling water to soften.
Add the egg, melted and cooled butter, sourdough starter, milk, and sugar to another medium-sized bowl and whisk to incorporate.
In a large mixing bowl, add all of the dry ingredients and stir to combine.
Add psyllium gel and the wet ingredients to the bowl with the dry ingredients and mix thoroughly. You can either use an electric mixer with dough hooks, or a wooden spoon or simply mix the dough by hand!
The dough will be sticky but avoid the temptation to add extra flour to the dough! Flour the working surface and transfer the dough to it. Dust the dough with flour until it is workable. Shape it into a large ball.
Divide the dough into eight parts using either a bench scraper or a knife. You can weigh each piece to make sure they are exactly the same size!
Take each piece of dough and shape it into a small ball. Dust the working surface as necessary to prevent the dough from sticking too much. You can see how I shape each piece in the pictures (see post)!
Proofing/Fermentation
Grease a large baking dish (ceramic or glass are fine) and place the buns in it. Cover the baking dish with a kitchen towel or a plastic wrap. Let the buns proof either for 3.5-4 hours at room temperature or overnight in the refrigerator (12-18h).
Baking
Once the buns are ready, start preheating the oven to 400F/200C. Add a baking dish with water to the bottom of the oven to create extra steam. Whisk 1 egg to make the egg wash and brush the buns with a silicone brush.Mix the flour, xanthan gum, oil, and water to make the flour mix. Add it to a piping bag or a simple zip-lock bag and cut off the tip.
Once you do the egg wash, pipe the flour mixture onto the rolls as you see in the picture (see post). Bake the rolls at 400F/200C for 25 minutes, then take the dish with water out and continue baking for another 15 minutes. If the buns are browning too soon, cover them with foil to prevent burning.
Mix the jam with water and brush the buns as soon as you take them out to create a sweet glaze on the tops.
Wait for the rolls to cool for 10-15 minutes and enjoy!
Notes
StorageStore the hot cross buns in the refrigerator for 3-5 days. Warm them up before eating for extra softness.You can freeze the buns for up to 3 months. Place them into the microwave for 30-60 seconds to defrost!Expert tips
Avoid opening the oven in the first 25 minutes of baking.
If the buns are too dense, try adding extra liquid to the dough next time.
Use a digital kitchen scale to ensure the right measurements.
Substitutes
Psyllium husk - there is no good substitute for psyllium husk that would yield the same results.