Preheat your oven to 350 Degrees

Measure out the walnuts on a food scale, crush them into tiny pieces with a rolling pin, and set them aside for later

Now cut up the stick of butter into small pieces, add it to a dish, and microwave it until melted (around 30 seconds - 1 minute)

While the butter is melting, add the eggs into a large bowl and whisk them until the yolks combine into the whites

Once that's taken care of, add the butter and the rest of the liquid ingredients into the bowl

Whisk all of the ingredients until they're combined, and set them aside

In an even larger bowl add all of the dry ingredients (except the walnuts) and whisk them until combined

When they're combined, add the wet ingredients into the dry and fold them into one another until a thick batter forms

Now add 1/2 of the walnuts into the batter, and mix/fold again

At this point you can add paper liners to a 12 slotted muffin tray and coat the liners with baking spray

Add the batter to the slots - the recipe makes 9 large muffins, or 12 medium muffins so plan accordingly

Top each muffin with the left over walnuts, and bake for 25-30 minutes

Let the muffins cool in the tray you baked them in

Store in an air-tight container in the fridge for several days