Heat oven to 180C/160C fan/gas 4
and line a few baking trays with baking
parchment. Melt the butter, condensed
milk and syrup in a large saucepan.
Very roughly crush the cornflakes in
a bowl with your hands, then stir in the
oats, flour, custard powder and bicarb,
and mix really well.
Once everything in the pan has melted,
take it off the heat and stir in the dry
ingredients. Roughly scoop heaped
tablespoonfuls of the mixture onto the
baking sheets. Crumble over a few more
cornflakes, then squash to flatten a bit
with your hands. Bake for 12-15 mins
until golden. Cool on a wire rack.