-
Preheat the oven to
180°C/350°F/Gas mark 4.
Grease a 20cm/8in
shallow square cake tin.
-
Beat together the butter
and sugar in a bowl
until light and fluffy.
Beat in the flour and
the rolled oats.
-
Press the mixture into
the base of the cake
tin. Bake for 25 minutes
or until golden brown.
Cool in the tin.
-
Place
the ingredients for the
caramel filling in a pan
and heat gently,
stirring, until the
sugar has dissolved and
the ingredients combine.
-
Gradually bring to the
boil over a very low
heat, then boil very
gently for 3 to 4
minutes, stirring
constantly until
thickened.
-
Pour the
caramel filling over the
biscuit base in the tin
and leave to set. Melt
the dark chocolate in a
heatproof bowl set over
a pan of simmering
water. Then spread it
over the caramel.
-
Melt
the white chocolate and
pipe lines of white
chocolate over the dark
chocolate. Leave to set
and cut into squares to
serve.