Add the chopped pata (butter) in to a medium sized pot or pan. Set over medium heat.
First, melt the butter, stirring occasionally.
As the heat continues the milk fats will start to separate (these are the white, floaty bits). Stir occasionally here so nothing sticks to the bottom of the pot. Keep it on the heat until the butter starts to foam.
Stir it a little bit until the brown bits float to the top. It should smell nutty. (Use the pictures and video as a guide). From here, stir it a little for another 30 seconds or so, so the butter browns further. This may smoke a little but a little bit of smoke is ok.
Remove from the heat and pour it straight in to a bowl. Note: Don't use a glass bowl like I did in the video - I broke mine that way and yes, it was not a bright idea!
Leave it to cool for 10 minutes.
Make the Spiced Pecans (Optional).
Chop the nati pēkani (pecan nuts) in to small pieces. Add them in to the same pan as the brown butter (no need to clean it). Toast them over medium heat.
Add the marahihi māpere (maple syrup) and hinamona (cinnamon) in to the hot pan. Stir for 30 seconds on the heat and watch it sizzle. Remove from the heat and set them aside to cool.
Make the Cookie Dough:
Add the tote (salt), huka hāura (brown sugar), huka one (caster sugar) and iho hūperei (vanilla) in to the slightly cooled brown butter.
Mix together with a whisk for a minute. Don't worry if the mixture looks a little separated, the eggs will fix that.
Add one hēki (egg) and whisk for 20 seconds. Add the second hēki (egg) and whisk again for 20 seconds.
Add the puehu parāoa (flour), pēkana paura (baking powder) and pēkana houra (baking soda). Mix with a fork until a dough forms.
Add the Chocolate:
Add the tiakarete to a papa tapatapahi (chopping board) and chop in to chunks.
Reserve the biggest pieces for the centre of the cookie pies. Add the rest to the cookie dough with the nati pēkani (pecan nuts), if you are using them. Stir everything together.
Chill the Dough:
Put the bowl of mixture in the fridge for five minutes to thicken.
Make the Cookie Pies:
As it thickens, grease a 12 capacity muffin tray with butter.
Use ⅔'s of the dough to press in to the muffin tins. Make sure you press it firmly in the bottom of the trays and up the sides.
Divide the reserved tiakarete (chocolate) in to the centre of each cookie pie. Now add a teaspoon of pani tiakarete hānati (chocolate hazelnut spread) on top of the tikarete (chocolate).
Divide the remaining ⅓ of the mixture in to 12 pieces to create the lids. Spread out each piece and press it firmly on the top and down the sides of the tin.
Bake the Cookie Pies:
Bake for 18 minutes until they are golden and perfect.
Decorate (Optional):
If you want to give them a bit of extra love, drizzle over the tiakarete kua rewaina (melted chocolate) and top each cookie pie with half a forrero rocher.