Slice each banana into two 2-inch long pieces and skewer each banana with 2 bamboo skewers. Using 2 skewers instead of 1 will create a more substantial popsicle stick.
Melt the ¼ cup white chocolate chips and add some blue oil-based food colouring. Dip the bananas into the chocolate so that the bottom half of the banana is fully coated in chocolate. Place the bananas on a plate lined with parchment paper and place them into the freezer to set for about 20 minutes.
Melt 1 tbsp of white chocolate chips and add 1 or 2 drops of black food colouring to create a grey colour. Pour the chocolate into a Ziploc bag and cut a small hole into one of the corners to create a piping bag. Pipe on the goggles of the minions by drawing one or two circles, then return the bananas to the freezer to set for 10 minutes.
Melt the remaining 1 tbsp of white chocolate chips and place into a Ziploc piping bag as well. Fill the goggles with the white chocolate to create the minions’ eyes, and return the bananas to the freezer to set for 10 minutes.
Melt the dark chocolate and place it into a Ziploc piping bag. Pipe on the goggle straps, eyes and mouths with the dark chocolate and return the bananas to the freezer for a final time for the chocolate to set, and enjoy!