Pictures used for articles show up on google with their own link

Hi,
I really tried out to find an answer before posting this topic to this forum. I don’t know where the problem is located so I also wrote a message to my theme support but due to christmas there might be a delay in answering.

If I google the name of my blog plus something I want to find like “Buchweizenpalatschinke”, google shows me the correct link to the recipe but a link to only the picture I used in this recipe too! Happens to normal blog posts as well. (For recipes I use a plugin)
I just uploaded pics to “Media” and used it as coverpictures. Why are they shown seperately on google and have their own link?

Google Search: https://goo.gl/3rp41t (first link leads to the picture only, second one to the recipe)
Link to the picture: https://tetrapackerl.com/buchweizenpalatschinken/
Link to the recipe: https://tetrapackerl.com/recipe/buchweizenpalatschinken/

Thank you for any help in this case!

The page I need help with: [log in to see the link]