To make 'brownies in a jar' you'll need a 1 litre glass jar.
In a small bowl, mix the plain flour, salt and baking powder together.
Carefully spoon half of the flour mixture into the bottom of the glass jar. Gently move the flour around so that you have an even layer.
Spoon the cocoa powder on top of the plain flour in the jar and spread around to create another even layer.
Spoon the remaining flour mixture over the top.
Continue to create the layers in the following order - brown sugar, caster sugar, milk chocolate chips, white chocolate chips and finally walnuts.
Close the lid of the glass jar (if you have any extra space at the top of the jar, simply top up with extra walnuts).
Print out our free recipe gift tag and attach to the jar with a ribbon (see notes). I
Notes
If you would prefer to handwrite your own gift tag rather than use our free printable, simply write: Preheat oven to 170 degrees celsius. Place all ingredients into a large bowl. Add 150g of melted butter & 3 lightly beaten eggs. Mix well. Pour the brownie batter into an 18X28cm baking tin. Bake for 25-30 minutes or until cooked through.To create even layers in the jar, use a spoon to gently add each layer of ingredients. You can also use a dry tea towel or paper towel to wipe down the inside of the glass as you go.