Preheat the oven to 170°C (338°F).
Cream the room-temperature butter and sugar until soft and smooth.
Add the egg and mix well.
Add sifted rice flour, Earl Grey tea powder, almond flour, and salt, then fold together with a spatula.
Chop walnuts, pecans, and other nuts and mix them in evenly.
Scoop spoonfuls of the dough and drop onto a baking pan.
Bake at 170°C (338°F) for 13-15 minutes.
Cool on a wire rack.