Grease a 20cm x 20cm baking pan, then line with baking paper
Place the self-raising flour in a large bowl, making a well in the centre
Pour the cream into the well, followed by the lemonade
Using a knife, mix the dough until it comes together
Turn dough out onto a floured surface (you may need to sprinkle more flour as you roll) and gently knead.
Using a floured rolling pin, roll dough out to a rectangle, measuring 40cm x 30cm (use an offset spatula or ruler to push edges back straight)
While dough is still reasonably cool from the lemonade and cream, use a pastry brush to spread the butter onto the dough. Spread to all edges, leaving a small border (a couple of centimetres) along one of the longer sides
Sprinkle the combined sugar and cinnamon over the butter, then press it into the butter
From the long side that's covered with cinnamon filling, start rolling tightly to form a long log, finishing at the side with no filling on the border
Using a large serrated knife, cut log into thirds, then each third into 3 again (giving you 9 rolls). Cut only towards you, rather than a sawing motion. The dough is soft and this will stop it from stretching
Place the 9 rolls into the lined baking pan and bake for 18 mins
While baking, make the Vanilla Bean Glaze