Combine butter and powdered sugar in a mix bowl, slow speed, until it is light and fluffy, for about 3 minutes. Beat in vanilla.

Slowly add flour, cornstarch and salt and keep mixing, the slowest speed until you get fine dough. Fold in mini chocolate chips.

Put the dough on plastic wraps or freezer bag and roll to ¼ inch. Leave it to cool until it becomes solid, for about 1 - 2 hours (30 minutes in the freezer would do).

Preheat oven to 325 F. Line baking sheet with baking paper. Take the dough out of the fridge. Cut the dough in sticks, any size you choose. Mine were 0.4 x 2.75 inches.

Put the sticks in the sheet, minimum 0.6 inches apart. Bake for 16-18 minutes or until the edges become brown.

Take them out of the oven and leave to cool in the sheet and then transfer them on the wire rack to cool completely.

Melt chocolate chips following the instructions on the package, add oil and stir. Dip the sticks in melted chocolate and place them on parchment paper.

Enjoy!