Grapefruit and Orange Marmalade
4 Oranges
2 Small Grapefruits
1 ½ pint Water
1 level tsp Bicarbonate of Soda
5 lbs Sugar
1 Bottle Certo
1. Wash the fruit and remove the skins in
quarters using a sharp knife.
2. Shave off and discard about half of the
white part.
3. Shred the skins very finely and place
in a pan with the water and
bicarbonate
of soda.
4. Bring to the boil and simmer, covered,
for 10 minutes or until the skins
can
be crushed easily between the thumb and forefinger, stir
occasionally.
5. Cut up the peeled fruit, discarding the
pips and tough skin.
6. Add the pulp and juice to the cooked
rind and simmer, covered for a
further
20 minutes.
7. Put the sugar and 3 pints of prepared
fruit into a pan making up the
quantity
with water if necessary.
8. Heat gently, stirring occasionally,
until the sugar has dissolved.
9. Add a small knob of butter or
margarine, bring to a full rolling boil and
boil
rapidly for 5 minutes.
10. Remove from the heat and stir in the
Certo.
11. Stir and skim alternatively.