Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large bowl, use an electric mixer to cream the softened butter and sugar together until the mixture is light and fluffy, about 3 minutes.

Beat in the egg, vanilla extract, and corn syrup until everything is well combined.

In another bowl, whisk together the flour, baking soda, baking powder, and salt.

Gradually add the dry mixture to the wet ingredients, mixing until just combined.

Gently fold in the mini red M&Ms and candy sprinkles into the cookie dough.

Using a 1 ½-inch cookie scoop, drop rounded amounts of dough onto the prepared baking sheet.

Press each cookie down gently and add a few extra M&Ms and sprinkles on top if you wish.

Bake in the preheated oven for 10 to 11 minutes, or until the edges are golden brown.

Remove from the oven and let your cookies cool on the baking sheet for a couple of minutes before transferring them to a wire rack to cool completely.