Add flour and salt and mix until you end up with a weird lumpy mixture. Now, just use your hands to knead this mixture into sugar cookie dough.
Roll this dough between two sheets of wax paper. Then, remove the top sheet of wax paper and spread the sprinkles all over the flattened cookie dough. Place the sheet of wax paper on top again and roll it one last time so as to push the sprinkles into the dough.
Use cookie cutters to cut out shapes and place them on a cookie tray, lined with parchment paper.
Bake at 350 degrees for 6 minutes and then rotate your tray and bake for another 3 minutes. Your cookies are ready when they are light golden brown around the edges.
Read all my tips above.
Leftovers can be stored in a cookie jar at room temperature for up to 1 week.