The single serve cup blends from the bottom with a more traditional blender blade design, whereas the jar blends through the middle with many different blades. (testkitchentuesday.com)
If you do not have an immersion blender you can use a traditional blender to puree the sauce a little at a time. (celebrating-family.com)
For a traditional blender, simply add all ingredients to the blender and blend until smooth and creamy. (paleorunningmomma.com)