Put the butter, salt and icing sugar in a deep bowl (unsalted butter is made from pure cow's milk so the milky taste of your cookie comes from the butter).

Use a spatula or your hands to cream all together until smooth

Add the all purpose flour and corn starch

Mix well together and mold

Roll out using a rolling pin to 1/2 inches thickness then place the dough in the freezer to harden.

Pour the sprinkles in a plate

After dough has hardened, remove from freezer and use a cooker cutter or any cutter of your choice to cut cookie to shape.
then gently press each cut cookie on the sprinkle and place on a lined oven tray.

Place a parchment paper on top to cover the cookies before placing it in the preheated oven(180degrees c). To prevent quick browning of the cookies as you do not need to brown the cookie and also to avoid melting the sprinkles.

Place on the lower oven rack between 15-20 minutes while checking every 5 minutes to ensure it does not get brown.

Remove from oven and place gently on a lined rack to cool