Melt 1 cup of vegan chocolate chips in the microwave by heating them on high for 1 minute and 30 seconds. Then stir the chocolate and heat again in 20-second increments until melty if needed. (You can also melt the chocolate in a double boiler.)
Add 2 tablespoons of peanut butter and stir well until combined.
Add 2 1/2 cups of chow mein noodles to the melted chocolate and stir well until the noodles are completely coated in chocolate. (If adding marshmallow, nuts, or other add-ins, reduce the noodles to 2 cups and add 1/2 cup of add-ins.)
Spoon into little haystack shapes on a piece of parchment paper.
Decorate with some sprinkles before the chocolate hardens if desired.
Allow hardening completely before storing. You can put them in the fridge or freezer for a few minutes to help them firm up faster if needed.
Notes
Don't melt the chocolate chips directly over a heat source. You must melt them in a microwave or in a double boiler.
Be careful not to overheat your chocolate in the microwave. You can burn the chocolate if you microwave it too long.