Lightly grease a 12-hole muffin tray with a little excess butter/margarine. Set aside.
In a bain-marie, melt the chocolate, butter/margarine and golden syrup; stirring continuously.
Once melted, add your cornflakes and gently mix well, until all the cornflakes are coated in the chocolate mixture.
Spoon the chocolate-coated cornflakes into your prepared tray, gently pressing them into place and creating a slight indent in the middle.
Add a few mini eggs to the middle of each chocolate nest, gently pressing them into place.
Allow your nests to set in the fridge for an hour or two, before enjoying.