My local grocery store has had a long run of cheap flats of berries this spring (see http://www.piecrustcookies.com/2022/04/lemon-ricotta-pancakes.html). Recently I bought raspberries, thinking my boys would help me eat them, but instead I had to come up with ways to use them because I couldn't eat a whole flat by myself before mold began growing. This recipe was so delicious that they disappeared within a day and I had to make a second batch. A double batch of the chocolate raspberry oatmeal here http://www.piecrustcookies.com/2015/12/baked-oatmeal-three-stick-to-your-ribs.html was devoured within days as well!
This recipe comes from Dough Eyed, a baker in Colorado, and will work at elevations for 4,000-6,000 feet. I can't vouch for what will happen at sea level.
High Altitude Chocolate Raspberry Muffins
Source: https://www.dougheyed.com/chocolate-raspberry-muffins/
Yields 12 or a few more muffins, depending on how full you fill the tins
2 c flour
1 teas baking powder
1/2 teas salt
3/4 c sugar
3/4 c unsalted butter, melted
2 T vegetable oil
2 large eggs
1/4 c sour cream
1 1/2 teas vanilla
1/2 c buttermilk
1 c mini chocolate chips
1 pint fresh raspberries, washed and dried gently
Mix the flour, baking powder, salt, and sugar together in a large bowl. Whisk together the melted butter, oil, eggs, sour cream, vanilla, and buttermilk in a medium bowl. Add the wet ingredients to the dry ingredients, and fold together gently, until there are a couple of flour pockets remaining. Stir in the chocolate chips and raspberries until just barely combined. Cover, then let the batter rest for 20 minutes.
Preheat oven to 375F and prepare the muffin tin by lining with paper liners. (I didn't, and wish I had. the berries stuck to the pan, even though it was greased generously.) After resting, fill the tin generously with muffin batter. Bake for 20-25 minutes until golden brown. If you can stand it, let the muffins cool a bit, then enjoy!