Preheat the oven to 190ºc/170ºc fan and line a 9x9inch square rin with parchment paper, and leave to the side for now.
Add the butter to a bowl, and add in the two sugars. Mix until combined
Add the eggs and vanilla and mix again
Add the flour, cornflour, bicarbonate of soda and salt and mix again
Add the chocolate chips and most of the mini eggs and mix into the cookie dough
Press the mixture into the bottom of the tin and press in the handful of mini eggs into the top for decoration.
Bake the traybake in the oven for 18-22 minutes, until the top of the cookie bake looks ‘dry’!
Leave the cookie bars to cool, and then portion and enjoy!
Notes
If you don’t want to use Mini Eggs you can use M&Ms, Smarties, or anything chocolatey. I wouldn’t advise using Creme Eggs though because it will just turn into a sloppy mess! You could use caramel eggs, but they might need 5 minutes longer in the oven if they ooze everywhere.
These delicious beings will last in an airtight container for up to 5 days, but honestly, they’ll be eaten before then.
Try microwaving them when they’ve cooled if you want a gooey cookie, or even add a scoop of ice cream!
If you can't access cornflour - use 25g more flour, but the texture will change.
Also, if you can't access Plain Flour, you can use self raising, but again the texture will change.
If you can't find bicarbonate of soda, leave it out - but again the texture might change!