Line a 9" baking tin with parchment paper and set aside for later use.
Add butter, golden syrup and chocolate into a mixing bowl and melt in the microwave on a medium heat or melt in a pan on a low to medium heat.
Pour the crushed rich tea biscuits and Maltesers into the mixing bowl with the melted butter, chocolate and golden syrup mixture. Thoroughly mix the ingredients together.(I crushed a few Maltesers and left others whole)
Pour the tiffin mixture into the lined baking tin and press down with the back of a spoon until compressed.
Melt the milk chocolate in a small mixing bowl and pour over the Malteser tiffin. Spread evenly with an offset spatula.
Pour the Maltesers over the melted chocolate (I crushed a few and left others whole). Place the tiffin in the fridge for 2 hours or until set, then cut into slices.
Video
Notes
When Melting The Butter, Golden Syrup And Chocolate:When melting the butter, golden syrup and chocolate, it's best to melt on a medium heat until the butter has melted. Then take the bowl out of the microwave and stir, you'll notice the chocolate will continue to melt. If the chocolate hasn't fully melted and you're left with a couple chunks, place the bowl back in the microwave. Heat for a few seconds, then take it out and stir again till completely melted. I melt the ingredients this way to prevent the mixture from splitting and burning.
Chocolate Topping
I used 200g of chocolate which makes a thin chocolate topping (as shown in the video and pictures). If you want a thicker chocolate topping, add more chocolate. You can double the chocolate ingredients and use 400g of chocolate.