Preheat the oven to gas 4 / 180C / 350°F and line a cookie sheet with parchment paper
Mix the flour, sugar and egg replacer together in a bowl and put the rest of the cookie ingredients into a saucepan
Melt it together over a low heat, let cool to room temp then add to the dry mix
Split the dough into an even number of sausage shapes and place on the cookie sheet. I did 2 batches of 16
Flatten the sausages and tidy up the edges
Use a fork to make the peanut shell criss cross pattern on top
Pinch the middle of each cookie to make them peanut shell shaped
Bake for 14 - 16 minutes and let cool on the tray before transferring to a wire rack
Meanwhile, mix the filling ingredients together until smooth
Spread the underside of half of the cookies with the filling mixture and top with the remaining cookies
Serve immediately. Without filling they'll keep in an airtight container for up to 5 days
