In a big glass bowl, melt the margarine in the microwave on high for 1 minute, until melted

Add Condensed Milk and Sugar to the melted margarine, microwave on high for 1 minute

Mix together, scraping any sugar off the sides and microwave for 10 – 12 minutes on high – do not stir during this time

Remove the mixture from the microwave when it starts to turn brown and add in the vanilla and vinegar, stirring until slightly cool

OPTIONAL - Add 75g of the M&M’s, keep a few aside to put on top before resting the fudge mix, and gently mix in the rest

Pour the fudge into a small prepared baking tin – either slightly greased or lined with baking paper,

Add in the remaining M&M’s, pressing them gently into the top of the fudge and allow to cool

Once cooled, dip a large non-serrated knife into hot water, dry, then slice the fudge into small squares (the warm knife cuts through the set fudge like butter).

Store in an airtight container until you’re ready to package it up to gift