Preheat your oven to 350°F (175°C).

Cream together the softened butter, brown sugar, and granulated sugar in a mixing bowl until smooth.

Add the eggs and vanilla extract to the mixture, blending well until everything is thoroughly combined.

Combine the flour, salt, and baking powder in a separate bowl.

Gradually mix the dry ingredients into the wet ingredients, stirring until just combined.

Fold in the chocolate chips and festive sprinkles gently until evenly distributed throughout the batter.

Spread the batter evenly into a greased baking pan.

Bake for 25 minutes or until the edges are golden brown and a toothpick inserted in the center comes out with a few moist crumbs.

Cool the bars in the pan before cutting into squares for about 10-15 minutes.