Line Baking Pan: Line an 8-inch x 8-inch (20cm x 20cm) square baking pan with parchment paper and set aside.
Crush Biscuits: In a high-speed food processor, crush biscuits into crumbs, leaving some larger chunks for added texture.
Mix Dry Ingredients: Transfer the crushed biscuits into a large mixing bowl. Add cocoa powder and desiccated coconut. Mix with a wooden spoon until well combined.
Combine Wet Ingredients: Pour in the condensed milk and rum. Mix thoroughly until well combined. Tip: Use your hands for easier mixing!
Press into Tin: Press the mixture firmly into the lined baking pan, ensuring an even, flat surface. Set it aside.
White Chocolate Topping
Prepare the Topping: In a double boiler over simmering water, melt the white chocolate and coconut oil together, stirring occasionally until completely melted and smooth.
Spread Chocolate: Pour the melted white chocolate over the base, spreading it evenly with a spatula.
Chill and Set: Refrigerate the slice for 3-4 hours or until the base is solid and the chocolate has fully set.
Cut and Serve: Before cutting, allow the slice to sit at room temperature for 5-10 minutes, making it easier to slice through the chocolate without cracking. Enjoy!
Notes
Storage: Store the slice in an airtight container in the refrigerator for up to 1 week. Freeze: For longer storage, wrap the entire slab or individual slices in cling film, then place in a freezer-safe bag or container. It can be frozen for up to 3 months.Thaw: Thaw the slices in the refrigerator overnight. For quicker thawing, leave them at room temperature for a few hours until they are soft enough to eat.