Spoon 1/2 cup pumpkin puree into the center of a clean dish towel or several layers of paper towels. Gently squeeze out the excess liquid until you have 1/4 cup pumpkin paste remaining.
To a blender or food processor, add the 1/4 cup strained pumpkin, 1/4 cup cottage cheese, 3 tablespoons maple syrup, 2 tablespoons cashew butter, 1 teaspoon vanilla extract, 1 teaspoon apple cider vinegar, 1/2 teaspoon cinnamon, 1/2 teaspoon pumpkin pie spice, and 1/8 teaspoon salt. Blend until smooth and creamy. Stir in 1 cup almond flour and 1/4 cup vanilla protein powder by hand until a thick, rollable dough forms.
Line a baking sheet with parchment paper. Use a small cookie scoop or spoon to portion the dough into 24 balls. Place in the freezer for 30 minutes to firm up.
When ready to coat, melt 1/2 cup chocolate chips in the microwave in 30 second increments, stirring between each, until smooth. If needed, add 1-2 teaspoons coconut oil to reach a dippable consistency. Dip each frozen truffle in the melted chocolate, tapping off excess, and place back on the lined baking sheet. Chill until set, about 15 minutes, then enjoy!