Cream together the butter and sugar until light and fluffy.

In a microwave-safe mug, warm the milk and golden syrup for about 30 seconds until just heated.

Add the baking soda to the warm milk and golden syrup mixture.

Beat with a teaspoon until the mixture becomes frothy.

Pour the frothy milk and golden syrup mixture into the creamed butter and sugar.

Stir to combine well.

Gradually add the flour to the mixture, mixing until a smooth dough forms.

Roll teaspoonfuls of the dough into small balls.

Place the balls onto a baking tray lined with parchment paper.

Flatten each ball with a fork.

Bake in a preheated oven at 180°C (350°F) for 10-15 minutes.

Ensure the biscuits are not overcooked; they should be lightly golden.