When it comes to restaurants, it's not about what's on the outside that counts, but the delicious innards that make a fantastic restaurant experience. Check out these 13 places across Massachusetts that may not look too fancy, but serve absolutely delicious grub.

1. Santiago's Family Restaurant, Westfield

If you've never tasted authentic Puerto Rican food, you can pretty much ask for anything on the menu here and fall in love. This place definitely doesn't look like much from the outside, but their potato balls are sublime and the roast pork is to die for. (34 Franklin Street, Westfield)

2. Spoon, Lenox

A beautiful trip to the Berkshires wouldn't be complete without a stop at this locally-sourced, cozy breakfast nook. Spoon specializes in comfort food with a healthy streak. Try the poached eggs on quinoa, or the house-made corned beef hash. (26 Housatonic Street, Lenox)

3. Krau Thai, Buzzards Bay

This place is right off the Cape Cod canal, and seriously yummy. It's one probably one of the tiniest places you'll ever order Thai food, but don't let the lack of space fool you: Krau Thai is big on flavor. They serve authentic dishes in decent portions. Try the Tom Kah coconut soup, or the crab rangoons with sweet and sour sauce.

4. White Hut, West Springfield

This list wouldn't be complete without White Hut. They've been serving simple yet delicious burgers since 1959. Locals consider this the best burger joint around, and we'd have to agree. Try the cheeseburger with fried onions. (280 Memorial Avenue, West Springfield)

5. Amanouz Cafe, Northampton

This little place serves amazing and authentic Moroccan food made with only the freshest ingredients. The portions are hefty, the flavors are in your face (in the best way) and the atmosphere is warm and cozy. Try the salmon kabobs with salad or the lamb and couscous dish. If you really want to feel like you've escaped to Morocco, try the sweet mint tea and a slice of delicious baklava. (44 Main Street, Northampton)

6. Wagon Wheel Country Drive In, Gill

Don't let the look of this place fool you – their down-home storefront is hiding some quality cooking. Sit inside and check out the paint-by-number tables, or soak up a bit of sunshine at their outdoor picnic tables. Try the homemade ice cream shakes, or their flavorful burgers. (39 French King Highway, Gill)

7. Fatima's Cafe, Worcester

This cozy place serves giant platters of delicious Ethiopian food. The fare can be spicy, but the flavors are divine and the prices are definitely affordable. Try the samosas and the chai tea. (43 West Boylston Street, Worcester)

8. Bedford House of Roast Beef, Bedford

This spot looks sort of like an RMV from the outside, but the inside is filled with tender, tasty roast beef creations. You get lots of fries with your order, and the sandwiches are out of this world. Try the Super Beef Three-Way, featuring mustard, BBQ sauce and melted cheese. (328 Great Road, Bedford)

9. Margaret's, Fairhaven

Margaret's is a cozy and friendly neighborhood bistro. They specialize in mouthwatering seafood and great service. Reservations aren't accepted, though you can wait for a table in their charming upstairs library waiting room. This place is also BYOB, so feel free to take along your favorite bottle of wine or spirits. Try the lemon-basil and almond pesto encrusted haddock. (16 Main Street, Fairhaven)

10. Ernesto's, North End

This is a spectacular neighborhood pizza place that is tucked away amidst the tourist traps of the North End. Whether in the market for a whole pie or just a slice, Ernesto's is a great option. Pro tip: one slice here is actually two. So bring those elasticized pants. Try the eggplant and ricotta combo. (69 Salem Street, Boston)

11. Mike and Patty's, Boston

This is a tiny restaurant squeezed into the corner of a residential block. Breakfast sandwiches are the stars of the show here, and locals can be seen waiting in line most mornings. There isn't room for more than eight or so people at their one large table, so definitely consider getting your order to go. Try the Gualetiere, pictured.

12. Jerk Cafe, South Yarmouth

The portions here are huge, and the flavors are just as big and beautiful. Chef Shrimpy is the heart and soul of this Jamaican joint, and he's sure to give you a warm welcome. All the meat here is great, but try the jerk combo plate for a good variety of yummy fare. (1319 Route 28, South Yarmouth)

13. Breakfast Café, Haverhill

This spot is a local favorite with a lot of personality. The pancakes are fully loaded, and all your classic breakfast fare is well represented. Try the eggs Benedict or the "fruit lasagna" crepe dish. (695 South Main Street, Haverhill)

For more delicious comfort food, check out these "hole in the wall" restaurants that will blow your tastebuds away.