1. Preheat the oven to 350°F.2. Melt the chocolate in a double boiler.3. In a mixer, beat the butter and sugar until they turn white.4. Add the eggs one by one. Add the melted chocolate.5. In a bowl, mix the flour and baking powder together. Gradually add them to the chocolate mixture. Add the milk.6. Fill the individual molds halfway and top with pistachios.7. Divide the remaining mixture among the molds and bake for 20 minutes.8. Remove from the oven and let cool on a wire rack before serving.