30 minutes or less/dinner/meat/recipes

Dashi Butter Basted Steak Recipe

Posted July 27, 2016 by Stephanie

dashi butter steak - www.iamafoodblog.com

I know I’m a broken record, but wow, it’s August already? Remember when you were a kid and summer vacation seemed to stretch out forever?! I don’t know if it’s getting older or if it’s just that we don’t have back to school as a time marker anymore, but I feel like time is just flying by.

dashi butter steak - www.iamafoodblog.com

I guess it’s also because we’ve been doing so much. This summer has been full of camping (complete with morning fires and pour over coffee) as well as a trip to The Wizarding World of Harry Potter! I absolutely loved it. We had butterbeer, I tried my hand at some spells with Hermione’s wand, and we ordered off the kids menu because mac and cheese and chicken strips for life.

dashi butter steak - www.iamafoodblog.com

Sometimes it’s easy to forget, in the day-to-day of it all, how lucky I am to have found my person. Mike indulges me way too much and I have to admit, I take it for granted way too often – just like that Drake song I’m obsessed with. I’m trying to be better about it because I really am the luckiest I can be. Who else would go to Harry Potter with me and eat mac and cheese and wait around in the hot hot heat while I try for the millionth time to do the spells that were created to be successful for 4 year olds?

dashi butter steak - www.iamafoodblog.com

So, in efforts to show Mike a bit more “hey, I love you, please stay with me forever,” I made him a steak because nothing says I love you like red meat. I did up a dashi butter basted flank steak on top of a bed of buttery mashed potatoes and it was absolute magic. Maybe even as magic as Mike taking me to The Wizarding World of Harry Potter? ;)

dashi butter steak - www.iamafoodblog.com

Dashi Butter Basted Steak Recipe
makes 1 steak

Dashi and butter are a classic combination, at least in my kitchen. The deeply savory umami of dashi pairs perfectly with the richness of butter. Here I used dashi powder – you can find it at your friendly local Asian grocery store or on amazon.com.


  • 1 tablespoon oil
  • juice 1/2 lime
  • 2 tablespoons sweet soy sauce
  • 1 teaspoon dashi powder
  • freshly ground pepper
  • 1 lb flank steak

To Finish

  • 2 teaspoons dashi powder
  • 2 tablespoons room temperature butter
  • oil, for the pan
  • sliced green onions, to garnish
  • mashed potatoes, or rice, as a side

Whisk together the oil, lime juice, soy, dashi powder, and generous amount of pepper in a shallow dish. Add the steak, and flip to coat in the marinade. You can also put this in a ziplock bag. Marinate overnight if possible, or at least for 6 hours.

When ready to cook, mix together the dashi powder and butter. Set aside.

Heat up a cast iron pan over high heat. Add a touch of oil to the pan, spreading evenly. When it’s shimmery and on the verge of smoking, add the steak and cook, leaving it untouched for 2-3 minutes. Flip and add the butter dashi mix. Tilt the pan (using an oven mitt if needed) and use a large spoon to scoop the melted dashi butter over the top of the steak, turning down the heat to medium if needed. After 2-3 minutes, remove the steak from the pan and let rest.

Slice on a diagonal, against the grain. Top with a generous amount of sliced green onions, on top of a bed of mashed potatoes (or rice!).

Note: I winged the mashed potatoes, but the were one of the best batches I’ve made, probably because I took the time to force them through a sieve – I didn’t have a ricer on hand but to be honest, the sieve method yields fluffier, smoother potatoes.

dashi butter steak - www.iamafoodblog.com dashi butter steak - www.iamafoodblog.com


  1. I’d love you forever x infinity if you made me steak like this. Too cute. Lucky Mike, too! ^__^ (PS don’t kill me, I’ve never read Harry Potter… Rich has and loved them all… am I too late??) :P

  2. Jess says:

    I love your blog so much! not only does the pictures look great, I like reading about the little cute things that inspire you to cook in your personal life! :) I made the Cantonese roast pork from your blog coz I missed home, and it was a huge success! :) can’t wait to try this Asian marinate steak recipe!

  3. I’m a bit of a steak fanatic but I hadn’t heard of dashi powder before – have to say that this looks delicious!

  4. Dashi powder is definitely a new one for me, but if it makes my steak look anything like the one above, I’m in!! :)

  5. Farah says:

    hi what kind of font do you use on your pictures? it’s really lovely.

    1. Stephanie Le says:

      hi farah! thank you :) i do them by hand, no font

  6. Farah says:

    multi-talented? you’re amazing. I can’t wait to try this recipe. I’ll let you know how it turns out!

    loads of love from Singapore!

  7. CATHERINE says:

    This was off-the-charts delicious! I will definitely be making this again and again.

  8. Robin Beck says:

    What a wonderful thought, dashi and butter. I’ll never panic again if I don’t have any anchovies in the house.
    Also, I buy flap meat steaks which are perhaps the best tasting cut short of a hanging tender.

  9. Jordan says:

    I am a definite steak and potatoes kinda guy, this is for sure a must try.

  10. Nia Daniels says:

    i wanna know how to make those mashed potatoes tho

    1. Stephanie says:

      hi nia,
      they are these ones :)

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