In a large mixing bowl, measure and combine the 1 cup of rolled oats, the 1/4 cup of ground flaxseed (or chia seeds), the 1/4 cup of mini chocolate chips (if using), and the optional pinch of salt. Use a whisk or wooden spoon to gently toss the ingredients together until they are evenly distributed.

In a separate, medium-sized bowl, measure the 1/2 cup of peanut butter, the 1/3 cup of honey or maple syrup, and the 1 teaspoon of vanilla extract. Stir these wet ingredients vigorously until the mixture is smooth, creamy, and completely uniform in texture.

Pour the combined wet mixture from the medium bowl directly into the large bowl containing the dry ingredients. Use a sturdy rubber spatula or wooden spoon to thoroughly mix everything together. Ensure you scrape down the sides and the bottom of the bowl to incorporate all the oats and flaxseed into the peanut butter base. The mixture should be thick and slightly sticky.

Check the consistency of the mixture by pressing a small amount between two fingers. If it holds its shape firmly, it is ready. If it seems too dry and crumbly, add 1/2 teaspoon of water or milk at a time until the desired consistency is reached. Cover the bowl tightly with plastic wrap and transfer the mixture to the refrigerator. Chill for a minimum of 30 minutes; this step is crucial for firmness and ease of rolling.

Line a large baking sheet or plate with parchment paper. After the mixture has chilled, use a standard tablespoon or a small cookie scoop (1-ounce size) to portion out the mixture. Roll each portion firmly between the palms of your hands to form spherical bites, approximately 1 to 1.5 inches in diameter.

Place the finished energy bites onto the prepared baking sheet. They are ready to eat immediately. For best texture and longevity, store the No-Bake Peanut Butter Energy Bites in an airtight container in the refrigerator for up to 1 week, or freeze them for up to 3 months. Allow frozen bites to thaw slightly before consuming.