Ep74 Science of the doughnut, with Jim & Rose Stoupas, Walker’s Doughnuts

We Delve Into the Intricate Process of Crafting the Perfect Doughnut with Jim & Rose Stoupas,

Founders of Walker’s Doughnuts. As a Food Technologist, Jim Provides Expert Insights into the Technical and Creative Aspects of Doughnut Making, Sharing in Detail, What Sets Their Doughnuts Apart.

Episode Timeline

  • 00:00 – Introduction with Jim & Rose Stoupas from Walker’s Doughnuts
  • 00:31 – Doughnut basics and the importance of taste, shape, and texture
  • 01:24 – The Plimsoll Ring: sign of perfect proofing and frying
  • 02:50 – Toppings & decorations: shine, fondant, and visual appeal
  • 04:21 – Toffee Apple filling: perfecting caramelisation
  • 05:07 – Crunch & moisture control in fondant with cookie crumb
  • 06:11 – Bavarian Cream & Custard: made fresh daily in-store
  • 07:20 – Cherry Strudel doughnut: achieving the right crown & spread
  • 08:17 – Proofing & frying: yeast process for rise, texture & flavour
  • 09:43 – Bronut: the New Zealand jam & cream classic
  • 11:14 – Triple Chocolate doughnut: proprietary fondant & premium cocoa
  • 13:12 – Maintaining quality amid rising ingredient costs
  • 14:18 – The Babe Ruth doughnut: PB, caramel & chocolate
  • 15:33 – Franchisee model for doughnut decoration
  • 16:45 – Skilled bakers & Walker’s expansion plans
  • 18:08 – Wrap up

We covered the importance of taste, shape, and texture, emphasising the role of the ‘plimsoll ring’ in proofing and frying. Jim also discusses the challenges of maintaining a doughnut’s visual appeal, from getting the perfect fondant shine to ensuring toppings stay crunchy despite moisture.


Walker’s only uses high-quality ingredients, like their freshly made custard, and we share the behind-the-scenes development of unique doughnut flavours like the toffee apple filling, cherry strudel, and the New Zealand-inspired ‘bronut’ and more.

We also cover the difficulties of rising ingredient costs, especially in chocolates, and the business strategy of ensuring quality doesn’t suffer despite these challenges. Expansion and franchise models are explored, where franchisees will receive doughnuts pre-decorated, adding final touches to ensure consistent quality.

The episode highlights the precision, craftsmanship, and passion behind creating exceptional doughnuts while addressing the operational aspects of running a doughnut brand.

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