Pipe two circles next to each other on parchment paper with a small space between them (they will spread out once you top with berries). The bottom circle should be larger than the top.
Place the blueberries in a round shape on top of the chocolate circles, making sure the two blobs connect.
Allow to set.
Turn over the snowmen and pipe a white chocolate outline.
Add small chocolate blobs for the eyes, nose and buttons, then top with candy eyes, an orange sprinkle for the nose and black sprinkles for the buttons.