Mix the maize meal, flour, baking powder and salt together.
In a separate bowl, mix the peanut butter, sugar, eggs and butter together.
Add the peanut butter mix to the maize meal mix and combine to form a dough.
Roll the dough into golf-size balls, then gently press them onto a greased baking tray.
Bake in the oven for 12-15 minutes. Put them on a cooling rack.
While the biscuits cool, start making your filling.
Filling:
Put the butter into a mixer and beat until light and fluffy (you can also do this by hand).
In a separate bowl, mix the sugar, cocoa powder and salt together.
Once the butter is fluffy. Start adding you sugar mix, 1 heaped spoonful at a time until all incorporated.
Put the filling into a piping bag and pipe onto a big spoonful onto half of the biscuits. Use another biscuit to press the filling so they sandwich together.