If using butter, weigh it out cubed & leave to soften a bit. But if you forget, or are short on time, why not try this hack I reviewed? Go to How To Soften Butter In About 12 minutes Video. When ready, add the baking spread/butter, oil, vinegar, salt, sugar & egg yolk to a large mixing bowl & give a good mix together.
Now weigh/add in the bicarbonate of soda (baking soda) & give it all a mix through. Using the back of a metal spoon or fork, push down on the baking spread/butter to squash it into the other ingredients. Don’t be put off by the look of the wet ingredients. It will work out. See Photo 1 above.
Next weigh in the flour very gradually until you get a very thick & smooth dough, like cookie dough. I add in 125g (1 cup) of flour at a time & in the end I added 312g (2 1/2cups). Different types of flour, where & how it’s milled, result in a variation in how much liquid it will absorb. Therefore there can be no exact amount of flour to add here. To tell if it’s the correct consistency, roll a smooth ball of the dough & flatten it with your hand. If you can do that without it falling apart or sticking to you, it’s ready. See Photo 2 above.
Now cut out 2 extra large pieces of baking/parchment paper (approximately 40cm/15.5″ long). Give the dough a quick 5 second knead & form into a ball. At this point I also halved the dough to make two, with one half of the savoury cookies cheese flavoured. Flatten one half of the dough into a disc & place in the centre of the 2 sheets of baking paper. See Photo 3 above.
Roll out the dough until you get a thickness of at least the height of a £1 coin plus a 1p on top (5-6 mm or ⅕ – ¼″). See Photo 4 above. Place the dough (with the paper), onto a tray in your fridge. Then chill the dough for at least 2 hours or overnight (you could also freeze it for about 45 minutes, after chilling for 15 minutes). This is a very important step, not to be skipped.
For the second half of the dough, I added cheese Mature Scottish cheese/Sharp Cheddar). Place the cubed cheese in a food processor & blitz to large breadcrumb sized pieces. See Photo 5 above. Add cheese to the top of the disc of dough & knead whilst still in the bowl, just until all the cheese is distributed. Now roll out like before and chill in the fridge till firmer & easier to work with. Prepare your baking trays/sheets with paper.