Add all of the dry ingredients into a bowl and mix together.
Add the butter and ‘crumble’ it in by rubbing it together with the dry ingredients between your fingers.
Make a well in the middle and add the wet ingredients.
Mix until it all comes together and forms a soft dough. If you take a little out and can roll it into a ball then it’s ready.
Split into two balls and roll each out to approx. 5mm thick. Cut out a 4” square and 3.75” square from a piece of card and then place them on top of your rolled-out dough and cut around them. You’ll need x4 4” squares and x1 3.75” squares but I recommend cutting out a few spare just in case!
Assembling the box:
Take some time to check that your squares all fit together. The smallest square will be your base and the 4 larger squares should all fit around it. You may need to trim a couple to fit better and that’s no problem - just use a sharp knife to shave the edges off if needs be. And don’t worry if they’re not perfect - we can fill in any gaps in the next step!
Once you’re happy with how they fit together you can start to assemble! Pop some of your royal icing into a piping bag and pipe some along the first edge of your bottom square. Attach one of the larger squares and hold for a few seconds. It may be helpful to place an object such as a cup behind the larger square to hold it in place while you do the same for each other square.
Once all the squares have been attached pipe some icing along the joints on the inside of the box and smooth out with a knife or a spoon (or your finger!)
Allow to dry for at least 2 hours.
Check that your cookie box is completely dry before going any further or there will be tears - you have been warned!
Pour some Cake Angels sprinkles onto a large plate - I mixed Rainbow and Blush together for my own colourful mix!
Using a palette knife, spread the remaining royal icing around the outside of the box and roll the box in the sprinkles so that all sides are completely covered.
Add a little icing to the top edge of the box and sprinkle any remaining sprinkles on top.
Get creative! Colour your royal icing and add some swirls or stars using different piping nozzles. This is also a great way to hide any sprinkle free patches!
Allow to dry for at least 2 hours before moving. Once completely dry fill it with some tasty treats - the perfect way to serve treats at your next coffee morning or party!