Set the box grater into a medium pot. Using the side with large holes, carefully grate the kola nuts. The shreds will oxidize quickly, turning a rust-copper colour
Carefully add the boiling water, and the sugar. Stir - the colour will become rust-red and it'll produce a vegetal aroma
Bring to the boil on medium to high heat, uncovered, stirring now and again. The shreds will sink, then rise with time. Allow to cook until bubbling and somewhat thickened,10 to 12 minutes
Turn off the heat and leave to rest, covered, for 4 hours or overnight
Pass the bright-orange syrup-gel through a fine-mesh strainer, into a blender; reserve the candied kola nut shreds (for a kola nut smoothie and kola nut candy) and set aside
Blend the syrup-gel on high speed to reset the texture. It will turn creamy and frothy. Allow it to sit and settle, 10 to 20 minutes, until it returns to the transparent, orange thin syrup without the viscosity
To make a drink, combine a third of a cup of kola nut syrup with about two-thirds cup of hot or cold water, still or sparkling; or with palm wine for a contemporary exploration. Taste and adjust per your needs. Stir
Enjoy it hot or cold
Refrigerate any leftover syrup for up to 1 week