Chop the butter into small, even pieces then place into a large saucepan. Set the pan over a medium heat & allow to melt, stirring regularly with a spatula. Keep cooking, until the butter starts to foam, smells nutty & you can see that the milk solids in the bottom of the pan have turned golden brown.
Take the pan off the heat then whisk in the miso paste & the toasted milk powder, followed by the golden syrup, brown sugar & double cream.
Whisk in the eggs, lemon zest & juice and the salt.
Next, roughly chop up the remaining pecans (200 grams) then stir into the syrup.I like to chop the pecans into a mix of big & small pieces. Pour the pecan mix on top of the shortbread base, making sure that they nuts are evenly distributed in the topping.
Bake the pecan pie bars for 30-35 minutes, until the topping is set with a very slight jiggle. If the top starts to brown too much, cover the tin loosely with foil.
Once cooked, let the pecan pie bars cool completely in the tin then carefully remove from the tin then cut into pieces. I find that a sharp, serrated knife works best. It's best to wipe the knife clean between cuts.