1
Preheat the oven to 190 °C and grease a pie or cake tin. For extra buttery rolls, I like to brush the baking tray with 1-2 teaspoons of melted butter instead of the non-stick spray. Next, mix together the flour, caster sugar, baking powder, baking soda and salt. Add the egg, buttermilk and melted butter. Mix with a wooden spoon or rubber spatula until the ingredients come together. The dough will be very soft and slightly sticky. If it is too sticky and does not roll, add a little more flour until the dough no longer feels very sticky. But be careful when adding flour, the dough must remain soft.
2
Place the dough on a floured work surface and, using a lightly floured rolling pin, roll out the dough into a rectangle 25×35 cm. Brush the dough with softened butter (the softer it is, the easier it is to spread). Mix the brown sugar and cinnamon and sprinkle over the dough. Roll it tightly into a log-like shape. Using a very sharp knife, cut it into 12 more discs. Arrange the rolls on the prepared baking sheet. Then bake the cinnamon rolls for 22 to 26 minutes, until the edges are lightly browned. If you notice that the tops are browning too quickly, cover the baking tray loosely with aluminium foil and continue baking. Remove the baking tray from the oven and place the cinnamon rolls on a wire rack while you prepare the glaze.
3
In a medium bowl, using a hand or stand mixer fitted with a paddle or whisk attachment, beat the mascarpone cream cheese until smooth and creamy. Add the butter and whisk until smooth, then whisk in the icing sugar and BAM vanilla paste. Pour the resulting icing over the warm cinnamon rolls and serve immediately.