Preheat the oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper.

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Mix flour, sugar, baking powder, baking soda, and salt together in a bowl. Add buttermilk, butter, and eggs. Knead together with your hands or use an electric mixer; add raisins. Split dough in half and form into 2 loaves. Place on the prepared baking sheet.

Bake in the preheated oven until a toothpick inserted into the center of each loaf comes out clean, about 45 minutes.