1. In a large bowl, whisk cake mix with eggs, milk, oil, and vanilla until just combined.
2. Scrape batter into lightly oiled 8" round silicone cake pan.
3. Microwave, uncovered, on high 5 min. Rest in pan for 6 min; invert onto wire rack to cool. Or, bake in preheated 325° F oven for 40–45 min, or until a toothpick inserted in centre of cake comes out clean. Cool 10 min before unmolding.
4. Let cool completely before adding toppings, if desired.
