Fork distribution trick
We use a 5 tine pitch fork for this exact thing.
1. Load mulch in wheelbarrow, take to beds.
2. Grab a small load of mulch and hold fork horizontally. Shake back and forth and a nice metered delivery of fine mulch will fall below the fork into the plants. Fork would be about chest height for even distribution. The higher it is the better the distribution and the finer the cast.
3. Then use a blower or garden hose to wash the excess mulch off the plants stems and leaves and you are done.
Takes some practice but it works great for us and gives us a light coating in annual/perennial beds.