Place the chocolate chips in a microwave-safe bowl and microwave on 50% power for 1 minute. Continue microwaving in 15-second intervals, stirring after each interval, until the chocolate is completely melted. Transfer the melted chocolate to a sandwich bag and snip off one corner.
Use the melted chocolate to attach the pretzels to the corners of the brownies, positioning them to look like reindeer ears.
Add a small amount of melted chocolate to the backs of the candy eyes and Dots, then press them onto the brownies to create the reindeer faces. Allow the chocolate to harden before serving.