Fill the 1-Quart Mason Jar with dates. Check each one as you put it in to make sure there's no pits...they'll get stuck to your mixing blade later. No need to pack them in, just fill to the top.
Pour up to 2-cups of Hot Water over the dates and into Mason Jar. Make sure you do not go past the "shoulder" of the jar.
Using a stick blender*, gently start pureeing the dates and water. It may seem like it's not going to blend at first, but keep gently mashing down until you work your way to the bottom of the jar.
Continue working the stick blender carefully up and down the jar until the dates are evenly pureed. You'll think it's too watery at first, but within 2-3 minutes it will be about the color and consistency of apple butter.
Your date paste is ready! You can use it immediately, or store the Mason Jar in the fridge or freezer until needed.