Grease a baking tray and sprinkle lightly with flour, tap to remove any excess.
Place the flour and butter into a food processor and blitz using the pulse button until the mixture resembles bread crumbs. Tip into a large mixing bowl.
Add caster sugar, buttermilk, orange zest and the can of eff orange to the flour mixture.
Use a flat-bladed butter knife or spatula to stir gently to combine (don’t overmix, but ensure all combined).
Turn the dough out onto a floured surface and gently knead until it is together.
Using a rolling pin, lightly roll out the dough to approx 3cm thick and cut out rounds using a floured 5cm scone or cookie cutter.
Place the scones onto the tray close together (this will help them rise evenly).
Bake for 10-15 minutes or until golden and the scones sound hollow when tapped on the bottom. Transfer to a cake rack to cool.
For the cinnamon vanilla cream, place all ingredients into the bowl of a mixer and whip to firm peaks.
To serve, halve scones and spread with orange marmalade and dollop a spoonful of cream on top.