Mix your chopped strawberries and 1/8 cup sugar and set aside.
Heat your oil up in the dutch oven or deep cast iron skillet to 350°f at medium heat. The oil should be at least an inch and a half deep.
Whisk your flour, cinnamon, allspice, baking powder, baking soda, and salt together in a bowl.
In the bowl of your stand mixer, mix the buttermilk, sugar, butter, and egg on medium-low speed for 1 minute.
Add half of the flour mixture to the wet and mix on low-medium speed for 1 minute or until the clumps have disappeared. DO NOT OVER MIX!
Using a rubber spatula, scrape down the sides of the bowl so that everything can be mixed together. Add the rest of your flour mixture and continue mixing until fully incorporated.
Add your strawberry mixture and mix until just incorporated.
Heavily dust a workspace on your counter with flour. Turn dough onto the workspace and top with a dusting of flour.
Using your hands, gently pat dough down to 1/3 inch thick round. About 10-12 inches in diameter.
Using a 3 inch round cutter, cut about 10 rounds out.
Using a 1 inch round cutter, cut out the centers of each round to form your doughnuts and doughnut holes.
Lightly dust a baking sheet with flour and transfer dough rounds and centers to the tray.
Combine the scraps from your dough and knead into a ball. Pat down again and repeat the cutting process. I like tho make a weird shaped doughnut with the scraps after this process.
Transfer to the tray and refrigerate for 10 to 20 minutes while you get your oil temperature set.