I'll give you my trade secret best deer burgers awarded recipe.
1lb of deer burger
1/2 cup of fine chopped red onion
1/2 cup of fine chopped green peppers
1/4 cup give or take of ranch dressing
1/2 cup give or take of shredded cheese
About five good dashes of Worcestershire
All other seasonings is just to taste
season salt
black pepper
garlic powder
Cajun Seasoning/cayenne pepper is optional

When I grind the burger I'll take a piece of bacon and grind it in with about a 1/2 lb of venison. It gives it the bacon taste for all my burger that I use for this recipe. I also will grind the burger alone for everything else.