With over 14.5 million subscribers, Rosanna Pansino has one of the most popular baking channels on YouTube But she never would have imagined her success back in 2010 when she started making videos as a hobby. At the time, she was a working actor in Hollywood with dreams of landing a leading role, but after receiving an ultimatum from her agent, she was forced to choose between a career in traditional television or the nascent digital world of YouTube. More than a decade after her fateful choice, Rosanna has come full circle with her dreams in entertainment as she hosts her own shows on The Food Network — while continuing to post on YouTube and adding to her catalog of over 1,400 videos with more than 4.7 billion views.

This episode was produced by Carla Esteves, with music by Ramtin Arablouei

Edited by Neva Grant and Casey Herman, with research help from Melia Agudelo.

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Growing up, Danielle Walker’s family often convened for big meals prepared by her Italian grandmother, Grandma Marge. Back then, Danielle enjoyed a wide variety of food without restriction; but she began experiencing severe abdominal pain in her 20s that ultimately led her to totally transform her diet—cutting grains, lactose, sugar and more.

As Danielle found relief in this approach—and realized that others with similar ailments could as well—she began compiling her recipes in an online blog called Against All Grain. Before long, the self-taught chef became a bestselling cookbook author, more recently branching out with her own product lines and cooking courses.

This week on How I Built This Lab, Danielle talks with Guy about being an ‘accidental entrepreneur’ as she chronicles her journey to building a multifaceted business centered around healthy eating. Plus, Danielle shares her advice for other creators looking to build an audience and discusses food’s potential to help millions suffering from autoimmune diseases.

This episode was produced by Katherine Sypher with music composed by Ramtin Arablouei. It was edited by John Isabella with research help from Sam Paulson. Our audio engineer was Robert Rodriguez.

You can follow HIBT on X & Instagram, and email us at hibt@id.wondery.com.

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

As one of the most successful creators on YouTube, Mark Rober doesn’t see what he does as a business. Instead, it’s a way to celebrate science in the most joyful way possible. While working as an engineer at NASA, he made his YouTube debut with a tutorial on how to make a gory Halloween costume with two iPads and a lot of duct tape. Over time, his videos became more elaborate, including a belly flop into a pool full of Jello, and a demo of a glitter-fart bomb to get revenge on porch pirates. Within a few years, Mark was teaching online science classes and selling subscription boxes for kids. Today, his YouTube channel has 5.5 billion views, 48 million subscribers…and–astonishingly, given that audience–less than 150 videos.

This episode was produced by J.C. Howard, with music by Ramtin Arablouei

Edited by Neva Grant, with research help from Sam Paulson.

You can follow HIBT on Twitter & Instagram, and email us at hibt@id.wondery.com.

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.