Toasted rice powder is exactly what it sounds like. Take about 1/2 cup of jasmine rice. Toss it into a large dry skillet over medium heat (you want to try to get the rice in a one grain layer). Toss every 15-20 seconds or so. Dry roast the rice until it gets to be a light golden colour. Takes me about 10 minutes. Your stove is different so go for colour. Let it cool and grind in a spice grinder.