Prep Time 20 minutes mins
Cook Time 25 minutes mins
Total Time 45 minutes mins
For best results, weigh your ingredients using grams rather than cup measurements. Use 100% pumpkin puree, not pumpkin pie filling. The buttercream may be soft in warm conditions; you can swap some vegan butter for vegetable shortening for stability. Instant espresso powder blends more smoothly than instant coffee granules which require mixing with non-dairy milk first.