Line a 20 x 30cm baking tin with baking paper (or grease it with oil/butter)
In a saucepan, melt the butter, mincemeat and syrup on a low heat.
Switch the heat off and stir in the oats (and spices and zest if using*).
Transfer the mixture to the baking tin, smoothing out the top with the back of a spoon.
Place in the centre of the oven for 20 to 25 minutes or until the edges start to turn brown. The mixture will feel soft to the touch - the flapjack will harden up as it cools down. It's best to slice them before they cool down.
Once they have cooled down, remove from the tin and store in an airtight container if you are not eating them straight away.
Notes
*Optional ExtrasAdd an extra Christmas twist by adding a little ground spice or orange zest.Storing FlapjacksIf stored in an airtight container the flapjacks will last for 5 to 7 days.