Step 1

Bring chicken thighs, onion, celery, salt, and 5 cups water to a boil in a large pot. Reduce heat and simmer very gently until chicken is cooked through, 12–15 minutes from the time water starts simmering.

Step 2

Transfer chicken to a medium bowl; let cool. Strain broth through a fine-mesh sieve into a large measuring cup (you should have 4½ cups); discard solids.

Step 3

Toast chiles in a dry small skillet over medium-low heat until pliable and slightly puffed with a few lighter-colored blisters, about 3 minutes. Transfer to a blender, add raisins and 2 cups broth, and tamp down chiles to submerge. Let sit until softened, about 20 minutes.

Step 4

Add mole paste, bouillon paste, peanut butter, and sugar to blender and purée until smooth.

Step 5

Heat 2 Tbsp. oil in a clean large pot over medium. Pour chile paste into pan (stand back, mixture will spatter!) and cook, stirring and scraping bottom of pot constantly, until paste is dark, glossy, and the texture of ketchup, 8–10 minutes. Add chocolate and remaining 2½ cups broth; bring to a boil, whisking often. Cook, whisking, until chocolate is melted and sauce thickens slightly, about 2 minutes; season with salt. Let cool until just warm.

Step 6

Shred chicken in bowl and add half of cheese; toss to combine. Season with salt.

Step 7

Heat remaining ¼ cup oil in a small skillet over medium-high until hot but not smoking. Submerge each tortilla in oil just long enough to soften, 10–20 seconds each (they should be slightly darker with small blisters). Transfer to paper towels to drain.

Step 8

Preheat oven to 400°. Spread 1 cup mole in a 13x9" baking dish. Dip a tortilla in mole in pot, lightly scraping against rim to remove excess. Fill with ¼ cup chicken mixture, roll up tightly, and place seam side down in baking dish. Repeat with remaining tortillas (they can be tightly packed into dish). Pour remaining mole over tortillas; sprinkle remaining cheese on top. Bake until cheese is melted and filling is warmed through, 8–10 minutes.

Step 9

Top enchiladas with cilantro and onion and serve with rice, refried beans, and lime wedges for squeezing over.