Step 1

Place frozen bananas, nut butter, 2 cups (500ml) milk, cocoa, oats and dates in a food processor and whiz until smooth. Pour into a 1L (4-cup) freezerproof container and freeze overnight or until firm.

Step 2

When you’re ready to assemble the freakshakes, using an ice cream scoop, scoop 4 balls of the smoothie mixture onto a tray and place in the freezer. Place remaining smoothie mixture and remaining 11/2 cups (375ml) milk in a food processor and whiz until smooth.

Step 3

Carefully drizzle the inside of 4 x 300ml-capacity glasses with melted chocolate. Add liquid smoothie mixture, then top with frozen scoops of smoothie mixture. Decorate with sliced banana, chopped hazelnuts and blueberry skewers, if using.