Lemony Coconut Biscuit Bars - no bake!

So, with a day full of rain yesterday what was I to do other than get my pinny on and try out some new recipes? This one is adapted from a recipe in The 4 Ingredients Cookbook, but I've altered ingredients to make it how I like it!

The Recipe:

200g of crushed up digestive biscuits (could also use Rich Tea biscuits)
130g melted butter
1/2 can condensed milk (i used 'light')
zest of 2 lemons
1 cup dessicated coconut

Make 'em:

Mix the melted butter and condensed milk, then add all other ingredients and mix until thoroughly combined. line a square dish with some cling film and press the mixture in firmly. Allow to set in the fridge for about 2 hours, then cut into slices/bars of your choice. WARNING: These are bloody moreish when lazing around on a Sunday afternoon watching telly!!