Step 1
Preheat oven to 180°C. Line 2 baking trays with baking paper. Use an electric mixer to beat the butter and sugar in a bowl until pale and creamy. Add the flour and rice flour. Stir until the dough comes together. Turn onto a lightly floured surface. Knead until smooth.
Step 2
Roll out the dough on a lightly floured surface to a 3mm-thick disc. Use a 5cm-diameter egg-shaped pastry cutter to cut out shapes. (Alternatively, trace an egg shape on baking paper and use it as a template to cut out shapes.) Place in the fridge for 10 mins to chill.
Step 3
Bake, swapping trays halfway through cooking, for 10-12 mins or until light golden. Set aside on trays to cool.
Step 4
Place the icing sugar in a small bowl. Add enough water to make a firm paste. Place the 100’s & 1000’s on a small plate. Spread 1 biscuit with a little paste. Dip, paste-side down, in the 100’s & 1000’s to coat. Return to the tray. Repeat with remaining biscuits, half the remaining paste and remaining 100’s & 1000’s. Set aside to set.
Step 5
Roll the white icing out on a surface dusted with icing sugar to a 1mm-thick disc. Use egg-shaped cutter or template to cut egg shapes from icing. Use a small sharp knife to cut a zig-zag pattern along the centre. Attach to some of the biscuits using a little remaining paste to make eggshells. Set aside to set.
Place the icing sugar in a small bowl. Add enough water to make a firm paste. Place the 100’s & 1000’s on a small plate. Spread 1 biscuit with a little paste. Dip, paste-side down, in the 100’s & 1000’s to coat. Return to the tray. Repeat with remaining biscuits, half the remaining paste and remaining 100’s & 1000’s. Set aside to set.