Prep Time 15 minutes mins
Cook Time 12 minutes mins
Resting Time 45 minutes mins
Total Time 1 hour hr 12 minutes mins
For best flavor, toast the pecans in a 175°C (350°F) oven for 6 to 8 minutes and cool them before adding, as this deepens the nutty taste and keeps them crunchy in the frosting. Stir constantly while cooking the custard base to prevent scrambling the egg yolks, and keep the heat at medium—not high—so it thickens gradually without curdling. The frosting thickens significantly as it cools, so avoid overcooking it on the stove; stop when it just coats the back of a spoon. If it becomes too thick after cooling, loosen it with a tablespoon of evaporated milk, and always frost completely cooled cupcakes so the topping stays in place and doesn’t melt.