a soft and luminous home for relleno barcelona
In Barcelona’s Eixample district, interior designer Isern Serra has completed the first flagship store for RELLENO, a Madrid-born filled-pasta brand with a strong digital identity. The project translates the Spanish brand’s concept into architecture through a physical vocabulary of texture and reflective materials.
The design is anchored by a system of soft modules — foam-filled cushions wrapped in sustainable metallic Italian fabric — referred to as ‘rellenos,’ the Spanish word for ‘fillings.’ These elements line the space in a geometric grid, shaping an interior that is both tactile and immersive. Each piece reflects the product’s essence: the act of filling, of enclosing something within.
images © David Zarzoso
glowing interior design by isern serra
For RELLENO, which built its reputation on delivery and digital presence, the Barcelona flagship by Isern Serra marks a shift from virtual engagement to physical experience. Serra’s approach was to express the brand’s sophisticated and design-focused tone through a controlled palette.
The metallic fabric of the ‘rellenos’ glimmers under soft, adjustable lighting, producing a subtle dialogue between surface and glow. Stainless steel counters, mirror-clad pillars, and orange reflections reinforce a sense of precision and care. The neutral framework allows the brand’s packaging and pasta to emerge visually, mirroring the way fashion houses frame their garments within spare, luminous spaces.
RELLENO opens its first Barcelona flagship with a design-minded identity
a grid of metallic poufs
Across two levels of Relleno Barcelona, Isern Serra’s layout balances automated efficiency and human contact. The ground floor opens to a five-meter ceiling, with digital kiosks on one side and a stainless steel counter on the other, attended by staff. Above, an Inox lamp by MLK Furniture hangs like a suspended marker within the vertical volume.
Deeper inside, the ceiling drops to three meters, enveloping visitors in the ‘relleno’ grid. Seating poufs and a dispenser wall — each composed of the same metallic fabric — extend the visual language of filling into functional forms. The numbered slots for pickup integrate technology and craft, presenting the product as both designed object and meal.
Isern Serra builds the space around soft modular ‘rellenos’
reflective surfaces lend color-changing interiors
Lighting defines the store’s atmosphere as much as its materials. Neutral bases are illuminated by the reflective quality of the fabric and by RGB fixtures that flood the space primarily in orange, the brand’s signature color. At certain moments, the lightbox shifts hue, adapting to collaborations or events and amplifying the chromatic identity.
Upstairs, a custom sofa wraps the perimeter, its metallic surface mirroring the ceiling grid above. Circular stainless steel tables and stools, also by MLK Furniture, punctuate the room. A mirrored wall and a stainless-clad central pillar multiply the reflections, creating a sense of continuity between materials, light, and motion.
the design translates the brand’s filled-pasta concept into a design language
the upper level expands the metallic grid through custom seating and stainless steel furniture
immersive lighting in shifting colors creates an ever-changing atmosphere
a lowered ceiling wrapped in metallic poufs creates an intimate space
details include stainless steel counters and reflective surfaces
project info:
name: Relleno | @relleno.eu
interior design: Isern Serra | @isernserra
location: Barcelona, Spain
team leader: Aran Escudero
graphics: Omni | @omnidesign
completion: June 2025
photography: © David Zarzoso | @david_zarzoso
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